Vacuum pump air tightness detection device

The invention is applicable to the field of vacuum pump detection, and provides a vacuum pump airtightness detection device, which comprises a detection box main body, a detection water cavity arranged at the bottom end and a drying mechanism arranged at the top end in the detection box main body; a support turntable is arranged on one side of the detection box main body, fixes a to-be-detected vacuum pump and rotates to drive the to-be-detected vacuum pump to enter the detection water cavity or the drying mechanism; an inflation cavity is further arranged between the supporting rotary disc and the fixing ring cover and connected with the vacuum pump to be detected through an inflation pipe, and the inflation cavity inflates the vacuum pump to be detected. According to the air tightness detection device provided by the invention, the multiple groups of clamping mechanisms are arranged on the supporting turntable, so that the air tightness detection efficiency is improved, the air inlet valve is only conducted