Abstract: With the large and complex bracket part of a special vehicle as an example，a forming process method of
squeeze casting was proposed for large and complex parts，and a corresponding squeeze casting mold was designed．Then，the numerical simulations of the temperature and flow fields of castings were performed by using the software ProCAST，and the forming parameters were verified． Finally，a squeeze casting forming experiment of large and complex bracket parts was conducted on the A356 aluminum alloy material，and the castings meeting the requirements were obtained． The results show that the designed mold has a good performance in forming large and complex parts，which proves that the proposed squeeze casting forming process is feasible and effective．

Key words: Squeeze casting, Mold design, Large and complex parts, Forming process