Provided is a method for manufacturing a composite filter tube and filter element made of a multilayer metal mesh and metal powders, the method comprising: knitting to obtain metal meshes of different mesh numbers, obtaining a laminated structure by means of a lamination method, then putting the laminated structure in a vacuum furnace for sintering processing, sintering a metal composite layer to obtain a composite filter sheet and tube made of a multilayer metal mesh and metal powders with a multilayer metal mesh as a structure support layer and a metal powder sinter structure as a filter layer, then rolling the composite filter sheet and tube into a tubular filter element by using a shaping machine, and welding to obtain a composite filter tube and filter element product made of a multilayer metal mesh and metal powders. A composite structure which adopts a multilayer metal mesh as a support layer and a metal powder sintering layer as a filter layer has the characteristics of low filtration resistance, large filtration flux and strong pressure-bearing capability, and is applied to an S-Zorb device of the China Petroleum and Chemical Co., LTD., which increases the filtration flow by 30%-50%, so that the whole output is substantially increased more than twice.
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