Pre-application evaluation of patents is important to improve patent quality, form high-value patent, and promote the transformation of achievements. By investigating the current situation of pre-application evaluation of patent in domestic universities, the problems existing in the pre-application evaluation of patents in universities was analyze. A classification and grading pre-application evaluation model for patent is proposed, which is guided by improving the quality of patent applications and creating high-value patent, taking objective elements as evaluation indicators, and taking into account the classification and grading of different application purposes of the invention body in terms of school organization and personnel allocation, fund investment, and the differences in the application purposes of the invention body. Since different evaluation levels are adopted for different invention bodies, compared with traditional evaluation, it can effectively reduce personnel and capital investment.