This paper introduces a kind of simulator experimental system of a variable pitch wind turbine. This experiment system hardware consists of the ac motor, ac frequency converter, dc generators, ARM7 panel, rotational speed sensor etc. Based on the ARM Developer Suite integration programming environment, wind turbine simulation software that operated in the embedded operating system C/OS - II and C/GUI GUI is designed. The wind turbine software with wind speed size input, simulator wind speed curve selection, wind turbine power curve generation, variable pitch control and rotate speed measurement function, achieve true wind turbine in different wind conditions simulated a wind turbine operation. Test results show that this variable pitch wind turbine simulator is success. It is significance for wind power research and application.