The position control of electrohydraulic proportional system is an important part of the control field. The traditional control method takes PLC as the control subject, but the PLC memory and computing power are limited. For this purpose, the electrohydraulic proportional position control system based on virtual instrument was developed. The system takes LabVIEW as software development platform, combined with displacement sensor, USB6008 data acquisition card, proportional amplifier, electrohydraulic proportional flow valve, triposition fourway solenoid valve to realize the position control of electrohydraulic proportional system. The hardware of the system was only used as input and output, and it could be used to store and analyze the data with strong storage capacity and computing power. Experimental results show that this method is feasible and can complete system position control accurately.