Abstract: To meet the large quantities of cleaning requirement of the aluminum alloy structure in the cooling system, it is necessary to develop a new type of special cleaning device. In the device, the FX2N is integrated as CPU and HMI is used for humanmachine interaction. Lines are arranged in parallel. Therefore, the device can complete several processes after only one clamping. The principle and composition of the cleaning equipment are introduced. The design principle and control process of the control system are described in detail. The software realization method and the major work interface of the system are given. Practice shows that the system can work with reliability and stability and fulfill the design specification. This device has greatly improved the automation level of the product and cleaning efficiency.