The invention provides a method for processing a high-performance polyethylene braided wire for a fishing gear or a culture cage, relates to processing of a fishing screen wire, and provides the method for processing the polyethylene braided wire. The method uses a fishing self-reinforcing polyethylene monofilament, and fills a core in the center of the braided wire. The method is characterized in that the core diameter equals to (a wire diameter-2*a yarn diameter) * an empirical factor of a mandrel, and the empirical factor of the mandrel is between 0.980 and 0.990; the number of yarns for the mandrel equals to (the core diameter/the yarn diameter) <2>*an empirical factor of the yarns for the mandrel, and the empirical factor of the yarns for the mandrel is between 0.176 and 0.185; the pitch length is determined by the wire diameter multiplied by the empirical factor of the pitch length, and the empirical factor of the pitch length is between 1.240 and 1.950; the number of strands is 16; the number of the yarns for the strands equals to (pi*the wire diameter* the empirical factor of the number of the yarns for strands)/(16*the yarn diameter); and the empirical factor of the number of the yarns for the strands is between 1.360 and 1.520. The method can be used for processing the high-performance polyethylene braided wire for the fishing gear or the culture cage.