The equipment is used for the pretreatment of glass fiber and polyester fiber in the production of Immunoassayphy rapid tests. It is consists of three parts: feeding platform, reagent tank and upper and lower pressure roller. Firstly, the sample pad is fed into the reagent tank through the feeding platform and is absorbed in the reagent slot. The processed sample pad is driven by a stepping motor, and then the excess reagent is extruded out after through the upper and the lower pressing rollers. It has the advantages of simple structure, convenient operation and uniform treatment, which greatly improves the processing efficiency of the sample pad.