A new structure angle measurement facility is presented, the principle of facility is linear interpolation subdivided to electric grating with high-frequency pulses, the mechanical structure of measurement facility is simplified, and avoiding the difficulty of subdivision angle on physical condition while compared with the ordinary high accuracy angle sensor. The signal processing of facility based on Filed Programmable Gate Array and single-chip microprocessor realized non-contacted angle measurement. The error of facility is analyzed and tested by experiments; the high theoretical accuracy of measurement facility is verified according to the test, so this system is promising.