HVDC control system is the brain of a HVDC transmission system. An accurate control system simulation model is of great importance for investigating the exact dynamic behavior of HVDC system. A method for establishing EMTDC simulation model is presented based on actual control system procedure named Hidraw. A simulation model close to actual control system is achieved by combining PSCAD/EMTDC and Hidraw. Comparisons between the simulation results and the field operation waveforms show the correctness of the proposed model.