Aiming at the high energy consumption and low energy utilization rate of die casting machine,a model of energy consumption of die casting machine based on energy flow and simulation was proposed.The energy consumption characteristics and influence of important process parameters on system energy consumption were studied.Aiming at the problem of long period and high cost of energy consumption evaluation of die casting machine,a new method based on energy consumption model simulation was proposed to calculate the energy consumption level of die casting machine.The energy flow characteristics of die casting machine were analyzed.According to the energy distribution law and energy conservation principle,the energy consumption calculation model of die casting machine was built;AMESim and C language were used to simulate the energy consumption of hydraulic system of die casting machine.The influences of different pressures and different rapid injection speeds on the system energy consumption were studied.The energy consumption data of die casting machine was obtained and the energy efficiency level of die casting machine was evaluated according to relevant standards.The results show that the energy efficiency of the die casting machine is high,and the useful work accounts for about 50% of the total energy consumption;the energy efficiency of the injection process is low,the useful work accounts for 21% of the total energy consumption;the instantaneous power in the rapid compression stage is very high;the influences of the pressured pressure and the rapid injection speed on the energy consumption of the press mechanism are relatively small;the energy efficiency level of the die casting machine calculated by simulation is close to the actual result,with the specific energy consumption error of 8%.The results show that the proposed model and method are accurate and feasible.