The utility model discloses an inner tube air nozzle air tightness test device, which comprises a seat body; a driving cylinder frame is arranged above the seat body; a driving cylinder is installed on the driving cylinder frame; and the telescopic end of the driving cylinder is installed There is an air nozzle clip; a bottom air nozzle is installed on the seat body; the bottom of the bottom air nozzle is connected to the blowing mechanism through a gas pipe. The inner tube air nozzle air tightness test device of the utility model drives the air cylinder to press the inflated inner tube air nozzle on the bottom air nozzle; and blows through the air blowing mechanism, which can realize automatic detection and high detection accuracy.