The invention provides a wind power generation simulation system and a control method thereof. The wind power generation simulation system comprises a variable-pitch subsystem and a main control yaw subsystem; the variable-pitch subsystem comprises a variable-pitch motor and a variable-pitch cabinet which are electrically connected; the main control yaw subsystem comprises a main control cabinet,a cabin cabinet and a yaw motor which are electrically connected in sequence; and the main control cabinet is electrically connected to the variable-pitch cabinet through the cabin cabinet, is used for controlling the variable-pitch cabinet to drive the variable-pitch motor to rotate so as to simulate variable pitch and is used for controlling the cabin cabinet to drive the yaw motor to simulate yaw. According to the wind power generation simulation system, the variable-pitch subsystem and the main control yaw subsystem are additionally arranged, the variable-pitch situation of the wind powergeneration simulation system in actual application is simulated through the variable-pitch subsystem, the yaw situation of the wind power generation simulation system in actual application is simulated through the main control yaw subsystem, and therefore the working conditions of a wind generating set in actual application can be comprehensively and accurately simulated.