This paper mainly focuses on the research and test of the process of using the gold base filler metal BAu70NiPd1005/1045 for the valve assembly. The simulation test parts are mainly used for the process groping test. After the adjustment of the parameters,the detailed assembly,the improvement of the tooling and so on,a set of welding process scheme for the Co-Cr-W and the superalloy GH4169 is finally developed. The problem of vacuum brazing technology for valve assembly using gold based solder has been successfully solved. At present,this scheme has been applied in actual production and guided production.