Abstract: An approach of auto-generating general-purpose chemical engineering flows-heeting program by the system simulation main control-module is proposed. The executable code of the system simulation is generated automatically by the information related to the system partitioning, tearing and calculation sequence of a chemical engineering process, obtained by the system structure analysis. Our simulation main control-module consisting of the program inlaid with FORTRAN and batch processing statement is used to treat the information obtained. The simulation is implemented in microcomputer, so that manual programming for simulation can be avoided. The main control-module may be used for various simulation strategies, such as the sequential-modular and the simultaneous-modular approach.