The invention discloses a surface treatment of ultra-high molecular weight polyethylene fiber and an EVA resin coating method. The method comprises the following steps :4-16 pieces of ultra-high molecular weight polyethylene fibers with fiber line density of 30 dtex-1,500dtex are knitted;the surface treatment is carried out by corona or plasma treatment; the ultra-high molecular weight polyethylene knitting yarn after the surface treatment is further process is further process by the EVA resin coating treatment; the coating processing conditions are: the extruder temperature is 90 DEG C/100 DEG C/110 DEG C/120 DEG C/120 DEG C, the coating power is 10-20m/min. The surface treatment of ultra-high molecular weight polyethylene fiber has the advantages of simple preparation and excellent performance and can be used as fishing line, fishing net line and the like; and the main performance parameters: the line body suspension length is 10-15cm, the rubbing fastness is level 5, and the color fastness to washing is level 5.