The invention discloses a bottom plate used for a non-planar sieve. The bottom plate comprises a bottom plate body, supporting bodies are arranged on the bottom plate body, liquid discharge through holes are formed in the supporting bodies, and the supporting bodies are used for supporting non-planar portions of the non-planar sieve. The supporting bodies are arranged on the bottom plate body, the non-planar portions of the non-planar sieve are supported by the supporting bodies, enough supporting strength is provided for the non-planar portions of the non-planar sieve, and thus the non-planar sieve is not prone to damage, and the service life of the non-planar sieve is prolonged. Through the supporting bodies on the bottom plate body, the contact area of the bottom plate body and the non-planar sieve is increased, the bonding strength of the bottom plate body and the non-planar sieve is improved, and the non-planar sieve is not prone to fall off from the bottom plate body. On this basis, the invention further provides a sieve box adopting the bottom plate used for the non-planar sieve. On this basis, the invention further provides vibrating sieving equipment adopting the bottom plate used for the non-planar sieve.