Automatic paper sheet humidifier

The utility model relates to an automatic paper sheet humidifier. The paper sheet humidifying device solves the problems that in the prior art, a paper sheet humidifying device is complex in humidifying step and poor in using effect. The device comprises an assembly frame, a mounting frame body is arranged at the upper end of the assembly frame, an electric cabinet is arranged at one end of the mounting frame body, a water return mechanism is arranged on the circumferential inner side of the assembly frame, lead screw positioning frames which are located on the circumferential inner side of the water return mechanism and are obliquely and symmetrically arranged are arranged in the assembly frame, and humidifying spaces are formed in the circumferential inner sides of the lead screw positioning frames; a humidifying spraying device which can ascend and descend in the axial direction of the lead screw positioning frame and is arranged towards the humidifying space is arranged on the mounting frame body through