In this article, a non-contact inductive angular displacement sensor is designed, which consists of a stator and a rotor. The rotor is obtained from the sector-shaped copper foil. The stator contains a set of excitation coils, a set of receiving coils and subsequent processing circuits. When an alternating current is applied to the excitation coil, the induced electromotive force generated by the two adjacent receiving coils is equal in magnitude and opposite in direction. Meanwhile, the induced voltage is 0. When the rotor rotates above the receiving coil, the eddy current generated in the rotor will cause and the induced voltages of two adjacent receiving coils have different changes. Through theoretical and simulation analysis, the amplitude of the induced voltages in the receiving coils changes in sine and cosine with the rotor rotation. The algorithm is applied to identify and calibrate the sine and cosine signals, and the prototype is tested with a high-precision time grid turntable with a positioning accuracy of 0. 000 3° as a reference. Results show that, after the calibration, the sensor error is 0. 1° within the range of 0° ~ 360°. It could meet actual production requirements, and the feasibility of the program is verified.