Switch cabinet capable of automatically closing cabinet door and use method of switch cabinet

The invention belongs to the technical field of switch cabinets, and discloses a switch cabinet capable of automatically closing a cabinet door and a using method thereof.The switch cabinet comprises a cabinet body and an inner cavity formed in the front face of the cabinet body, a flame sensor and an ultrasonic sensor are arranged on the top and the side face of the inner cavity respectively, and an inner cabinet door is movably arranged in the inner cavity in a sleeved mode. Air is input into the moving assembly through the first air channel, so that the inner cabinet door and the outer cabinet door are pushed to move downwards to be reset, meanwhile, after the switching assembly drives the moving assembly to move transversely, the inner cabinet door which moves downwards to be reset synchronously moves transversely into an inner cavity of the cabinet body, and rotating closing is completed; the switching assembly drives the moving assembly to move and then seals the moving assembly again, it is guaranteed