The article describes the production process and actual product properties of Cr-Mo steel for gasifier developed by Wugang.By taking key technological measures such as optimized composition design,grain refining,microstructure homogenization,simulated post welding heat treatment process,Wugang has successfully produced SA387Gr11Cl2 steel plate under hydrogen environment,which satisfies the performance requirements of gasifier.Comparing with the same product produced by foreign advanced steel works,Wugang produced steel plate for gasifier is of good actual product properties with equivalent properties of those from foreign advanced steel works.