The invention discloses a partition net with a novel multi-layer structure of a spiral roll-type membrane component. The partition net can improve the pollution-proof capacity of the spiral roll-type membrane component, and reduce the flow resistance of a raw material flowing side of the membrane component. A method for reducing pollutants on the surface of the spiral roll-type membrane component is characterized by comprising the following steps: A, a partition net structure is utilized to divide a raw material fluid in the membrane component into two parts, namely, a membrane surface and a middle layer; B, a partition net grid structure, which is close to a separating membrane side, is used for strengthening the turbulence on the surface of the separating membrane, and the power of the fluid is utilized to enable impurities in the raw material fluid to be unlikely to stay and deposit on the surface of the separating membrane; C, the middle layer of the partition net grid structure is used for reducing the flow resistance along a flowing direction of the raw material fluid, so that impurities, which are involved in the middle layer in the step B, can flow out of the membrane component as soon as possible.