In view of the problem of the unmanned helicopter control method without self decisions, management, diagnosis and repairing ability, the self flight digital simulation of the unmanned helicopter is tested. The test is based on the unmanned helicopter with the main rotor and tail rotor. According to the state coefficient matrix and control coefficient matrix obtained by wind tunnel test, a self flight control law is designed to the simulation model. The digital simulation is made in the VC++ develop environment. The simulation result shows that the method is reasonable and reliable with friendly interface and the dynamic changes of flight status can be monitored in real time.