Prefabricated zero-pressure system of clean room

The utility model discloses a clean room prefabricated zero-pressure system which comprises a zero-pressure tank body and zero-pressure intermediate tanks, the centers of the spherical surfaces of the left end and the right end of the zero-pressure tank body are connected with zero-pressure intermediate tank main branches in all floors through zero-pressure tank main branches, and the arc-shaped positions of the upper end and the lower end of the zero-pressure tank body are connected with a plurality of zero-pressure tank secondary branches. The zero-pressure tank main branches are symmetrically arranged along the transverse axis of the zero-pressure tank main body in a one-to-one mode, instruments are arranged on the zero-pressure tank main body and the zero-pressure tank secondary branches, the zero-pressure tank main branches are further connected with differential pressure sensors through hoses, and the differential pressure sensors are connected with a pressure stabilizing box located in a clean room. Ac