diff --git a/lib/Conversion/ImportVerilog/Expressions.cpp b/lib/Conversion/ImportVerilog/Expressions.cpp
index 92eaa4fdb8b2..3dd3c629ba6c 100644
--- a/lib/Conversion/ImportVerilog/Expressions.cpp
+++ b/lib/Conversion/ImportVerilog/Expressions.cpp
@@ -798,19 +798,70 @@ struct RvalueExprVisitor {
   }
   
   Value visit(const slang::ast::StreamingConcatenationExpression &expr) {
-    SmallVector<Value> arguments;
+    SmallVector<Value> operands;
     for (auto stream: expr.streams()) {
       auto value = context.convertRvalueExpression(*stream.operand);
-      // mlir::emitError(value.getLoc(), "expression of type ")
-      //   << value.getType();
+      if (!value)
+        continue;
+      value = context.convertToSimpleBitVector(value);
+      operands.push_back(value);
+    }
+    if(expr.sliceSize == 0) {
+      return builder.create<moore::ConcatOp>(loc, operands);
+    }
 
-      if(!value) {
-        mlir::emitError(loc) << "error occour";
+    SmallVector<Value> slicedOperands;
+    SmallVector<Value> tempOperands;
+    size_t currentWidth = 0;
+    for (auto value : operands) {
+      auto sliceSize = expr.sliceSize;
+      tempOperands.push_back(value);
+      currentWidth += cast<moore::IntType>(value.getType()).getWidth();
+
+      while(currentWidth >= sliceSize) {
+        // mlir::emitError(loc) <<currentWidth;
+        auto lastValue = tempOperands.back();
+        tempOperands.pop_back();
+        auto type = cast<moore::IntType>(lastValue.getType());
+
+        if(currentWidth == sliceSize) {
+          // do not need extract operation
+          if(tempOperands.empty()) {
+            slicedOperands.push_back(lastValue);
+          } else {
+            tempOperands.push_back(lastValue);
+            auto concatOp = builder.create<moore::ConcatOp>(loc, tempOperands);
+            slicedOperands.push_back(concatOp.getResult());
+          }
+          tempOperands.clear();
+        } else {
+          auto remainWidth = currentWidth - sliceSize;
+          auto extractWidth = type.getWidth() - remainWidth;
+          auto extractResultType = moore::IntType::get(context.getContext(), 
+                                        extractWidth, type.getDomain());
+          auto remainExtractResultType = moore::IntType::get(context.getContext(), 
+                                        remainWidth, type.getDomain());
+
+          auto extractOp = builder.create<moore::ExtractOp>(loc, extractResultType, lastValue, 0);
+          auto remainExtractOp = builder.create<moore::ExtractOp>(loc, remainExtractResultType, lastValue, extractWidth);
+          
+          if(tempOperands.empty()) {
+            slicedOperands.push_back(extractOp.getResult());
+          } else {
+            tempOperands.push_back(extractOp.getResult());
+            auto concatOp = builder.create<moore::ConcatOp>(loc, tempOperands);
+            slicedOperands.push_back(concatOp.getResult());
+          }
+          tempOperands.clear();
+          tempOperands.push_back(remainExtractOp.getResult());
+        }
+        currentWidth -= sliceSize;
+        // mlir::emitError(loc) <<currentWidth;
       }
-      arguments.push_back(value);
     }
-    return builder.create<moore::StreamingConcatOp>(loc, arguments, 
-      builder.getUI32IntegerAttr(expr.sliceSize));
+    
+    std::reverse(slicedOperands.begin(), slicedOperands.end());
+    return builder.create<moore::ConcatOp>(loc, slicedOperands);
   }
 
   /// Emit an error for all other expressions.
@@ -952,19 +1003,69 @@ struct LvalueExprVisitor {
   }
 
   Value visit(const slang::ast::StreamingConcatenationExpression &expr) {
-    SmallVector<Value> arguments;
+    SmallVector<Value> operands;
     for (auto stream: expr.streams()) {
       auto value = context.convertLvalueExpression(*stream.operand);
-      // mlir::emitError(value.getLoc(), "expression of type ")
-      //   << value.getType();
+      if (!value)
+        continue;
+      operands.push_back(value);
+    }
+    if(expr.sliceSize == 0) {
+      return builder.create<moore::ConcatRefOp>(loc, operands);
+    }
 
-      if(!value) {
-        mlir::emitError(loc) << "error occour";
+    SmallVector<Value> slicedOperands;
+    SmallVector<Value> tempOperands;
+    size_t currentWidth = 0;
+    for (auto value : operands) {
+      auto sliceSize = expr.sliceSize;
+      tempOperands.push_back(value);
+      currentWidth += cast<moore::IntType>(cast<moore::RefType>(value.getType()).getNestedType()).getWidth();
+
+      while(currentWidth >= sliceSize) {
+        // mlir::emitError(loc) <<currentWidth;
+        auto lastValue = tempOperands.back();
+        tempOperands.pop_back();
+        auto type = cast<moore::IntType>(cast<moore::RefType>(lastValue.getType()).getNestedType());
+
+        if(currentWidth == sliceSize) {
+          // do not need extract operation
+          if(tempOperands.empty()) {
+            slicedOperands.push_back(lastValue);
+          } else {
+            tempOperands.push_back(lastValue);
+            auto concatOp = builder.create<moore::ConcatRefOp>(loc, tempOperands);
+            slicedOperands.push_back(concatOp.getResult());
+          }
+          tempOperands.clear();
+        } else {
+          auto remainWidth = currentWidth - sliceSize;
+          auto extractWidth = type.getWidth() - remainWidth;
+          auto extractResultType = moore::RefType::get(moore::IntType::get(context.getContext(), 
+                                        extractWidth, type.getDomain()));
+          auto remainExtractResultType = moore::RefType::get(moore::IntType::get(context.getContext(), 
+                                        remainWidth, type.getDomain()));
+
+          auto extractOp = builder.create<moore::ExtractRefOp>(loc, extractResultType, lastValue, 0);
+          auto remainExtractOp = builder.create<moore::ExtractRefOp>(loc, remainExtractResultType, lastValue, extractWidth);
+          
+          if(tempOperands.empty()) {
+            slicedOperands.push_back(extractOp.getResult());
+          } else {
+            tempOperands.push_back(extractOp.getResult());
+            auto concatOp = builder.create<moore::ConcatRefOp>(loc, tempOperands);
+            slicedOperands.push_back(concatOp.getResult());
+          }
+          tempOperands.clear();
+          tempOperands.push_back(remainExtractOp.getResult());
+        }
+        currentWidth -= sliceSize;
+        // mlir::emitError(loc) <<currentWidth;
       }
-      arguments.push_back(value);
     }
-    return builder.create<moore::StreamingConcatRefOp>(loc, arguments, 
-      builder.getUI32IntegerAttr(expr.sliceSize));
+    
+    std::reverse(slicedOperands.begin(), slicedOperands.end());
+    return builder.create<moore::ConcatRefOp>(loc, slicedOperands);
   }
 
   Value visit(const slang::ast::MemberAccessExpression &expr) {