The present invention relates to a composting heap turner experiment testing platform. The platform comprises a main conveyor belt, a side conveyor belt, a lifter, a bracing frame, a conveying trough and a conduit. The composting heap turner coats the upper end of the main conveyor belt to perform turning throw of materials transmitted on the main conveyor belt; the side conveyor belt is arranged at the output end of the main conveyor belt, and the input end of the side conveyor belt is connected with the output end of the main conveyor belt; the bracing frame is arranged at one side of the main conveyor belt, and the conveying trough is arranged at the upper end of the bracing frame; the input end of the lifter is connected with the output end of the side conveyor belt, and the output end of the lifter is communicated with the input end of the conveying trough; and one end of the conduit is communicated with the output end of the conveying trough, and the output end of the conduit is close to the input end of the main conveyor belt. Compared to the prior art, the experiment result approaches to the field test, the test result is more real and the cost is low.