The invention discloses a punch forming process and mould for a vehicle load sensing proportional valve support. The process comprises the following steps of feeding, blanking, auxiliary hole punching, forming, cutting and assembly hole punching; and a forming mould is divided into an upper die and a lower die, and the forming mould comprises an upper mould board (3), a terrace die (5), a lower mould board (15), a female die fixed plate (9), a guide column (1) and a guide sleeve (2). According to the process and the mould, by the adoption of a novel cold punching process, the difficult problem of finished piece positioning is solved, and one-time forming through the forming mould is realized. By the adoption of the process and the mould, the design size and the use performance of a product can be continuously and stably ensured, the capacity is promoted, the production cost is lowered, the quality and the fatigue life of an irregular and complex forming piece are improved, an outlook of the product is excellent, and the requirements on design and use are totally met.