The utility model discloses a diving computer watch, which comprises a circuit board, a switch connected with the circuit board, a shell and a key
assembly, the shell is provided with a watertight cavity, an
assembly cavity and a shell through hole communicated with the watertight cavity and the
assembly cavity, the switch and the circuit board are arranged in the watertight cavity, and the position of the switch corresponds to the position of the shell through hole. The key assembly comprises a key, an elastic element, a blocking piece, a sealing ring and an inner side clamping spring, the key comprises a key cap and a key rod, the outer end of the key rod is arranged on the key cap, the elastic element, the blocking piece and the sealing ring are arranged on the key rod in a sleeved mode, the sealing ring is located in the assembling cavity and clamped between the shell and the key rod, and the inner side clamping spring is arranged on the outer side of the key rod. The blocking piece is arranged to be used for blocking a cavity opening of the assembling cavity of the shell, the inner
diameter of the blocking piece is larger than the outer
diameter of the sealing ring, the outer end of the elastic element keeps still relative to the key cap, the inner end of the elastic element abuts against the blocking piece, and the inner side clamping spring clamps the inner end of the key rod in the watertight cavity of the shell.