The manufacturing method of tungsten alloy fishing sinkers is not much different from other tungsten alloys. Mix tungsten powder and other alloy powders in proportion and set aside under vacuum drying conditions; heat the resulting mixed powder to 2300℃ under nitrogen protection, heat it for 1hour and make it flow, then inject it into the mold cavity and cool it to obtain the desired shape of the blank; Then, it is heated to 1500°C under inert gas protection, sintered for 1hour and cooled.