The structure and tensile mechanic performance of self-reinforced polyethylene (SRPE)monofilament for fishing gear have been analyzed in standard laboratory. Compared with common polyethylene (PE)monofilament, SRPE monofilament gets a bit higher crystallization, sonic velocity value, and the morphology of the SRPE monofilament was shish-kebab structure; the SRPE monofilament is 12.75%,4.82% and 12.69% higher than the common PE monofilament in breaking strength ,knot breaking strength and rate of loss of knot breaking strength , respectively, while in percentage of breaking elongation the latter is 27.72% higher than the former. The conclusion reached can be used as reference in designing fishing gear and selecting netting materials.