The invention relates to the technical field of hot melt adhesive particle production, in particular to a manufacturing method of a filter net for a hot melt adhesive particle production device. The manufacturing method of the filter net for the hot melt adhesive particle production device comprises the following steps that SUS304 stainless steel is forged into a filter net frame, the filter net frame is provided with four hollowed-out portions, and the periphery of each hollowed-out portion is provided with fixing holes; four auxiliary filter nets are formed through forging of carbon steel and are identical in dimension, and each auxiliary filter net is provided with holes; the auxiliary filter nets are dipped in pretreatment liquid, and after being taken out, the auxiliary filter nets are flushed and dried, wherein a preparation method of the pretreatment liquid comprises the steps that 10 parts of acrylic emulsion, 5 parts of ethylene glycol and 10 parts of water are sequentially added to a reaction kettle, stirring is performed for 5 h at the temperature of 50 DEG C, cooling is conducted, impurities are removed through filtering, and then the pretreatment liquid is obtained; the pre-treated auxiliary filter nets are assembled to the filter net frame and fixed to the filter net frame through bolts. According to the manufacturing method of the filter net for the hot melt adhesive particle production device, through reasonable design of the manufacturing technology, the service life of the filter net is significantly prolonged, and compared with the wear resistance of products produced by the adoption of a traditional technology, the wear resistance of the filter net is improved by about 70%.