The utility model relates to a test device for optimizing microtopography to change wind conditions, and belongs to the technical field of wind power generation. Some newly-produced wind power plantsare complex in terrain, so that the generating capacity of a unit after operation is low, and the frequent fault occurrence phenomenon is common. The test platform comprises a test platform body, a test platform framework and a cover plate, the cover plate covers the framework, the framework comprises a transverse steel pipe, a longitudinal steel pipe and a vertical steel pipe, one end of the transverse steel pipe and one end of the longitudinal steel pipe are connected with the vertical steel pipe, and supporting mechanisms are connected between the transverse steel pipe and the vertical steel pipe and between the longitudinal steel pipe and the vertical steel pipe. The microtopography can be economically, quickly and safely optimized to change the wind condition, so that the economic benefit of the wind power plant is improved, and the safe and economic operation of the wind turbine generator is ensured.