The utility model relates to an airtight test technical field especially relates to an equipment of many bellows airtight tests simultaneously, include: cylinder block, first sealed end cap, nut, thesecond bottom plate sets up on first cylinder, and the second bottom plate is connected through the bolt with first cylinder, first bottom plate setting is on the second bottom plate, and first bottomplate is connected through the bolt with the second bottom plate, the fixed one side that sets up at first bottom plate of cylinder block, the second cylinder is fixed to be set up on the cylinder block, all be provided with the nut on the sealed end cap of first sealed end cap and second, and be provided with the polyurethane gasket in the nut. The utility model discloses a structural improvement has simple structure, and is easy and simple to handle, and the stable performance is reliable, and efficiency of software testing is high, automatic competent, to dwell time can the accurate control the advantage to the effectual problem and shortage that exists in the current device of having solved.