As a widely used surface strengthening technology, electroless plating can be applied to various materials such as metals and non-metals, but its process parameters are numerous and difficult to optimize. For this reason, this study designed a three-factor and four-level orthogonal experimental scheme with the main salt/reducing agent molar ratio, lactic acid and PH value as the factors, and the plating speed and microhardness as the evaluation indicators. The range analysis was carried out on the experimental results, the best process parameters were selected, and the influence rules and reasons of the three factors on the evaluation indexes were discussed.