Abstract:Abstract: To solve the failure problem of the hydraulic grab controller in practical work applications and better detect the hydraulic grab controller,hydraulic grab controller in-loop simulation and test system was studied and designed based on the wired communication and wireless communication knowledge which solved the detection of hydraulic grab controller's working parameters in engineering applications and the system accomplished the goal of the online analog hydraulic grab controller working status. The system consists of five parts which are PC-side host computer, USB-CAN, analog output module, solenoid valve and single-chip data processing module. It also comprehensively used the knowledge of wired communication and wireless communication to conduct research and design. In this paper, the design of hydraulic grab controller in-loop simulation and test system is reasonable and stable after the actual verification. Acquisition and transmission of the related parameters are timely and accurate.