The invention discloses a welding technology for a surfaced abrasion-resistant bronze layer in a cross head pin hole and relates to an improvement of a cross head component structure in a reciprocating compressor in the equipment manufacturing industry. According to the technology, the ZG270-500 cast steel cross head pin hole serves as a base body, tin bronze welding wires serve as welding material, the surfacing process is finished on the base body through pulsed metal argon-arc welding, and then the surfaced abrasion-resistant bronze layer is formed in the cross head pin hole. The surfacing method is used for replacing bronze bush inlaying, the combining strength between the tin bronze welding wires and the base body is higher than that between a bronze bush and the base body, the bronze bush does not need to be replaced after abrasion, and only local welding repair and machining are needed for completion. The tin bronze layer with the thickness of 3 mm is surfaced in the cross head pin hole and can be used for replacing the bronze bush with the thickness of 15 mm, the abrasion resistance requirement in the design is met, production and manufacturing cost is reduced, and manufacturing quality and production efficiency of the reciprocating compressor are improved. The welding technology is a great innovation in the manufacturing and designing of a cross head body in the reciprocating compressor and meets the market requirements of large-scale and high-pressure development of the reciprocating compressor.