Membrane separation assembly for sewage treatment

The invention belongs to the technical field of sewage treatment, and discloses a membrane separation assembly for sewage treatment, which comprises a membrane frame, an aeration pipe is arranged at the bottom of the membrane frame, two mounting plates are arranged at the top of the aeration pipe, two ends of the two mounting plates are fixedly mounted with the membrane frame, and a membrane assembly is arranged between the two mounting plates and located in the middle of the membrane frame. First movable openings are formed in the two ends, close to the two mounting plates, of the membrane frame, and supporting plates are fixedly connected to the two ends of the membrane frame and located on the two sides of the two mounting plates. The reverse double-threaded rod is driven to rotate through the rotary button, so that the movable blocks move close to each other, and therefore, the fixed blocks can move to the two sides of the membrane module under the action of the supporting blocks and the round bulges, the