The invention provides an automatic assembly test machine. The machine comprises a cabinet (1), a control panel (2) disposed on one side of the cabinet (1), a airtightness detecting device (3), a first conveyor belt (4), a first manipulator (5), a steel ball loading mechanism (6), a pressure steel ball mechanism (7), a marking mechanism (8), a pin sleeve feeding mechanism (9), a press pin mechanism (10), a pin bushing feeding mechanism (11), a second conveyor belt (12), a second manipulator (13) and a transfer mechanism (14), and solves the technical problems in the prior art that automatic completing is not achieved, the whole process is not smooth, the efficiency is low, the requirements for personnel and sites are high, and the cost is high, and the technical effects that the entire assembly test process is completed automatically, the whole process is smooth and highly efficient, the requirements for the personnel and the sites are low, and the cost is low are achieved.