Abstract: The outlet working condition of the injection molding die is harsh, which is very easy to be worn, making the outlet shape and size of the flow channel change. It has a great impact on the product quality and production efficiency. Therefore, it is urgent to carry out local strengthening of the outlet position of the flow channel. Based on this, the laser cladding technology is used to locally strengthen the outlet of the injection molding die. The material composition design of the reinforced coating, the cladding forming and defect control, the analysis of the structure and performance, and the process control of the actual workpiece processing are studied. The results show that compared with the commercial wear-resistant coating materials, the hardness of the coating materials developed by the researchers increased from 400HV to above 900HV. The wear-resistant performance of the coating increased 43 times compared with the matrix, while the friction coefficient decreased from 0.635 to 0.412, which greatly improved the wear-resistant performance of the die. The inner grain of the reinforced coating is fine and its strength and abrasion resistance are mainly guaranteed by martensite and in-situ ceramic carbide, and a small amount of austenite is left to guarantee its toughness. Through special path planning and process control, it has been successfully applied in local strengthening of injection molding dies, and the service life of the strengthened dies has been increased by more than 3 times.