The invention discloses equipment for an air tightness test, wherein front and rear end conveying lines are installed on the upper end side of the fixing support plate of the rack of the equipment, and the front and rear end conveying lines respectively comprise a movable seat, a fixed seat, an adjusting mechanism and a chain conveying line; an automatic pressure holding mechanism is installed above the front end conveying line, the automatic pressure holding mechanism comprises an automatic pressure holding mounting bracket, an automatic pressure holding cylinder, an automatic pressure holding movable plate and an automatic pressure holding lever, an automatic jacking sealing mechanism of the fixing support plate is installed below the automatic pressure holding mechanism, and the automatic jacking sealing mechanism comprises an automatic jacking cylinder, an automatic jacking movable frame, an automatic jacking rod, a plug driving cylinder, a plug mounting seat and a sealing plug; and a separation lifting cylinder on the upper surface of the fixing support plate is installed with studs between the rear end movable and fixed seats, a separation lifting plate is installed at the extension end of the piston rod of the separation lifting cylinder, and a separation pushing mechanism is installed on the upper end side of the rear end conveying line. The invention can effectively improve the efficiency of an air tightness test operation, which means the equipment has the advantages of novel design and high automation level.