With the increasing investment of resources exploration and development in China, a large amount of full hydraulic truck mounted rigs are put into the drilling production. SDC-2500 full hydraulic truck mounted rig has been developed by CNIET, on which the load-sensing hydraulic system and PLC electronic control system are applied in the control and execution system with the characteristics of high integration, strong mobility, full hydraulic top driving, remote control and alternative-process adaptability. In the field production test, the rig shows its high mechanization and reliability.