Salt spray test box

The invention provides a salt spray test box, and belongs to the technical field of salt spray test. The salt spray test box comprises a test box body, and a circulating air duct is arranged in the test box body; a driving motor is fixed to the outer wall of the top end outside the test box body, a circulating fan is arranged in the test box body and located on the lower portion of the circulating air duct, and the driving motor and the circulating fan are connected through a two-stage speed increasing bevel gear set. The condition that the motor driving shaft is rusted and locked is avoided, and the stability and reliability of the salt spray test box are improved; the vibration of the driving motor and the noise of the circulating fan are reduced, so that the severe working condition of equipment operation vibration is reduced; the feasibility of adopting a low-rotating-speed driving motor is realized, and the effect of vibration and noise reduction of the driving motor is achieved; the uniformity of salt m