Supporting element for flat membrane element and flat membrane element

The invention discloses a supporting element for a flat membrane element and the flat membrane element in the technical field of solid-liquid separation, and aims at solving the technical problems oflarge thickness, large weight, small effective filtering area and easy deformation of existing flat membrane elements; the element includes a support plate, the cross section of the support plate is wave-shaped, drainage holes are formed in each wave surface of the support plate, and welding zones are arranged around the support plate; the welding zones are solid bodies or hollow bodies, and whenthe welding zones are the solid bodies, the corresponding ends of the support plate are fixedly connected with the welding zones; when the welding zones are the hollow bodies, and the corresponding ends of the support plate are located in the hollow bodies or the corresponding ends of the support plate are fixedly connected with the interiors of the hollow bodies. The element not only has the advantages of good rigidity, h