Novel negative pressure dehydration mechanism for filter press and use method thereof

The invention discloses a novel negative pressure dehydration mechanism for a filter press and a use method thereof, relates to the technical field of filter presses, and aims to solve the problems that dehydration is realized by adopting a space reduction or gravity extrusion mode, the space reduction extrusion effect has high requirements on the strength of a filter tank, water backflow is easily caused, the gravity extrusion time is long, and the dehydration is incomplete. A filter tank is arranged on a mounting table, one end of the filter tank penetrates through the mounting table and extends to the position below the mounting table, damping supporting legs are arranged below the mounting table, the damping supporting legs and the filter tank are connected with the mounting table through screws, a filter plate is arranged in the filter tank, and a vacuum pump is arranged on one side of the filter tank. An air guide pipe is arranged at one end of the vacuum pump, a fourth electromagnetic valve is arranged