The invention provides a parametric modeling and labeling method. The parametric modeling and labeling method comprises the steps that 1, a foundation model of a sheet metal bracket is built, wherein the foundation model structurally comprises turnups, axle holes and fixing holes of the sheet metal bracket; 2, parameters of the foundation model are programmed; 3, a program automatically adjusts the foundation model according to the input sheet metal bracket model parameters, and a sheet metal bracket model is obtained; 4, the sheet metal bracket model is automatically labeled according to the input parameters; 5, a three-dimensional drawing of the sheet metal bracket model is output. The parametric modeling and labeling method has the advantages that through the parametric design, on the basis of the foundation model, modeling and intelligent labeling can be finished rapidly, a new model is generated rapidly to help a designer rapidly finish high-quality design work, repeated labor is avoided, the design and drawing difficulty is lowered, the requirements for product serialization and rapid amendment are met, the design speed of products is increased comprehensively, and the design quality of products is improved greatly.