Abstract: Using L304 silver solder as brazing filler metal, YG8 cemented carbide and 1Cr18Ni9Ti stainless steel were welded by high temperature argon gas-shielding brazing. The effects of brazing temperature on microstructure and mechanical properties of the brazing joint were studied by microstructure observation, energy spectrum analysis, hardness test and room-temperature shear test. The results show that with the increase of brazing temperature, the microstructure of joint was getting more and more uniform and compact. The brazing filler metal was melted gradually and filled the weld seam fully, and the brazing quality was improved. However, when the brazing temperature was higher than 920℃, the brazing joint exhibited overheating phenomenon, the microstructure became coarse and the brazing quality became poor. With the increase of brazing temperature, the shear strength and micro-hardness of brazing joint increased first and then decreased. When the brazing temperature was 910℃, the shear strength of brazing joint was 147.5 MPa and the micro-hardness was 194 HV, indicating that the brazing joint had the best comprehensive mechanical properties.