The invention discloses a tool fixture capable of fixing the position of a welding point and preventing welding leakage. The tool fixture includes a mechanical structure part controlled by a controller and an electrical control part; the mechanical structure part includes a trolley, a bottom plate, a pressure plate, an air cylinder and a welding leakage preventing lamp plate; the pressure plate isprovided with several holes; and the electrical control part includes an SB1 main power switch, an SB2 start button switch, a relay, a solenoid valve, a switch sensor and a green lamp. The tool fixture fixes the welding position through the pressure plate fixing holes, the green lamp is electrically controlled to prevent welding leakage, the welding stability is improved, the welding quality is ensured, the inspection intensity of quality inspectors is reduced, and the tool fixture has universality.