Abstract: To explore the suitable process for remanufacturing and repairing the outer raceway of the main bearing of shield tunneling machines using laser cladding technology, JG-11 iron-based alloy coating was deposited on a 42CrMo substrate using synchronous powder feeding laser cladding equipment. Based on a three-factor four-level orthogonal experiment, the effects of process parameters such as laser power, scanning speed, and powder feeder speed on the dilution rate, aspect ratio, and porosity of the coating were investigated. Four groups of good process parameters were selected for microstructure analysis, hardness testing, and friction and wear testing to explore the influence of process parameters on coating performance. The results indicate that the hardness of the coating can be increased by 2-3 times compared to the substrate. Appropriate process parameters have a significant effect on reducing the friction coefficient, and process parameters with relatively poor wear volume can reduce it by 45.7%. Abrasive wear and fatigue wear are the main causes of friction and wear.