Inclined repairing was used to explore the effects of laser cladding process parameters on the shaping properties of multi-pass cladding on an inclined plane in the work. The results showed that the coating area increased with increased laser power and overlap rate and decreased with the increased scanning speed. Besides, it first increased and then decreased with the increased feeding voltage. The dilution rate increased with increased laser power and scanning speed and decreased with increased overlap rate. Meanwhile, the rate first decreased and then increased with the increased powder feeding voltage. Flatness increased with increased laser power and overlap rate and decreased with the increased scanning speed and feeding voltage. Fitted mathematical models were subjected to multi-objective optimizations by the NSGA-II algorithm and response optimizer, respectively. The optimized results obtained by the response optimizer were better, while those obtained by the NSGA-II algorithm were more diversified.