diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 41b09298d7309..56aa887ba91b6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -26,5 +26,9 @@ jobs:
       - uses: actions/checkout@v3
 
       # Runs a set of commands using the runners shell
-      - name: Run a multi-line script
-        run: MOZCONFIG=./simulator-riscv64 ./mach build
+      - name:build simulator
+        run: MOZCONFIG=$PWD/riscv64config/simulator-riscv64 ./mach build
+
+      # Runs a set of commands using the runners shell
+      - name: cross build riscv64
+        run: MOZCONFIG=$PWD/riscv64config/riscv64-debug CFLAGS="-I/home/lyh/zlib/include" CXXFLAGS="-I/home/lyh/zlib/include" LDFLAGS=-L/home/lyh/zlib/lib/ CC=/home/lyh/llvm-build/Release+Asserts/bin/clang++ CXX=/home/lyh/llvm-build/Release+Asserts/bin/clang++ ./mach build
\ No newline at end of file
diff --git a/riscv64config/riscv64-debug b/riscv64config/riscv64-debug
new file mode 100644
index 0000000000000..fce72b6f14c9e
--- /dev/null
+++ b/riscv64config/riscv64-debug
@@ -0,0 +1,17 @@
+# Build only the JS shell
+ac_add_options --enable-application=js
+
+# Enable optimization for speed
+ac_add_options --enable-optimize
+
+# Disable debug checks to better match a release build of Firefox.
+ac_add_options --enable-debug
+
+# Use a separate objdir for optimized builds to allow easy
+# switching between optimized and debug builds while developing.
+mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/obj-opt-@CONFIG_GUESS@
+
+ac_add_options --target=riscv64-unknown-linux-gnu
+ac_add_options --disable-bootstrap
+ac_add_options --disable-rust-simd
+ac_add_options --enable-jit
diff --git a/simulator-riscv64 b/riscv64config/simulator-riscv64
similarity index 100%
rename from simulator-riscv64
rename to riscv64config/simulator-riscv64