Multi-layer EVA (Ethylene Vinyl Acetate) waterproof composite board

The utility model discloses a multilayer EVA (Ethylene Vinyl Acetate) waterproof composite board, and relates to the technical field of EVA waterproof composite boards. The multi-layer EVA waterproof composite board comprises an upper EVA board and a lower EVA board, an anti-deformation device is arranged in the upper EVA board, the anti-deformation device comprises a moving block, a limiting moving block is fixedly connected to the lower face of the moving block, a limiting groove is formed in the upper surface of the lower EVA board, the limiting moving block is movably connected into the limiting groove, and the limiting moving block is fixedly connected with the limiting groove. According to the multi-layer EVA waterproof composite board, reverse elastic force is generated through deformation of the second spring, when pressure on the surface leaves, the second spring rebounds, the limiting moving block is pushed to move reversely in the limiting groove, the pressure received by the multi-layer EVA waterp