Waterproof button switch

The invention relates to a waterproof button switch, comprising a metal outer cylinder, a base located below the metal outer cylinder, a conductive terminal inserted into the base, and a switch assembly installed in the metal outer cylinder, wherein at least two annular ribs are annularly arranged on an inner wall of the metal outer cylinder around the central axis, a soft silica gel cap is formedat the opening of the metal outer cylinder by die casting, annular grooves fitted with the annular ribs are formed in the edge of the soft silica gel cap by die casting, the at least two annular ribsare closely attached in the annular grooves in a one-to-one correspondence manner, the soft silica gel cap is in transmission connection with the switch assembly, and the on-off of the switch can beachieved by pressing the soft silica gel cap. Compared with the prior art, the waterproof button switch has the advantages that the metal outer cylinder and the soft silica gel cap form an integratedstructure by the die casting