Space special-shaped curved surface part machining allowance adjusting method and system

The invention discloses a method and system for adjusting the machining allowance of a spatial special-shaped curved surface part, and the method comprises the following steps: constructing a measurement point distribution model of the curved surface part after heat treatment under the condition of determining that the machining allowance of the curved surface part meets the subsequent heat treatment; wherein the post-heat-treatment measuring point distribution model is obtained based on the measuring point cloud of the overall size of the curved surface part after heat treatment; comparing the heat-treated measuring point distribution model with a preset part theoretical model to obtain a heat-treated working allowance distribution condition of the curved surface part; wherein the part theoretical model is obtained based on the size of the finished curved surface part; according to the working allowance distribution condition after heat treatment, whether the curved-surface part has a missing part or not is