Aiming at the problems of complication and heavy drawing workload of the triangle gate，based on the BIM technology application experience of Qinhuai River Honglan ship lock and Weicun hub expansion and reconstruction project，the triangle gate is disassembled to seven parts according to the structural characteristics and construction sequence，and the lumped parameter model is established by setting the overall parameters and local parameters. Through continuous debugging，the engineering templates are created with simplified input conditions and variable parameters，and the engineering quantity is extracted based on UDF. The batch processing of similar components is used by knowledge engineering rules capture skillfully，which greatly improves the modeling efficiency and realizes the automation，standardization and parametric design of triangle gate.