Valve tightness performance detection device

The utility model relates to the technical field of valves, in particular to a tightness performance detection device for a valve. By means of the mechanism, the valve can be detected through movement of the mechanism, the connector of the valve can be sealed when the valve is detected, air leakage is avoided during detection, and whether the valve leaks air or not can be judged by detecting bubbles generated in water; by means of the mechanism, the valve can be clamped through movement of the mechanism, leakproofness of the valve can be conveniently detected, shaking cannot occur during detection, and detection cannot be affected; through movement of the mechanism, the position and angle of the valve can be adjusted, connection with a detection mechanism is facilitated, detection is facilitated, and the detection efficiency is improved; according to the water supply mechanism, water can be supplied to the detection cavity through movement of the mechanism, water can be recycled after detection is completed,