The invention discloses a clamp spring automatic installation device based on an electric vehicle controller, which comprises a fixing frame and a conveying mechanism, a clamp spring assembling mechanism and a finished product sorting mechanism which are arranged on the fixing frame, wherein the conveying mechanism realizes the conveying of a workpiece through a synchronous plate chain, and the clamp spring assembling mechanism and the finished product sorting mechanism are sequentially arranged on one side of the synchronous plate chain, the automatic assembly of a clamp spring on the workpiece is realized through the clamp spring assembling mechanism, and the automatic sorting of the qualified finished product and the unqualified finished product is realized through the finished productsorting mechanism. The clamp spring automatic installation device has the characteristics of simple structure, convenient operation, low cost and the like. Aiming at the mounting position of the clampspring of the controller, the clamp spring is automatically installed by the industrial control equipment, and a series of flow of automatic feeding, clamp spring mounting, discharging and the unqualified product handling is completed in cooperation with the assembly line, which saves the labor cost and improves the production efficiency.