Drill pipe angle is one of the key parameters for adjusting drilling technology, which needs real-time measurement. In this paper, an angle sensor based on triboelectric nanogenerator is proposed. The sensor can be set to different resolutions by designing different EVA sheets. Taking 12 EVA sensors as an example, the test results indicated the sensitivity is 0.08^∘/V, the linearity is 5.2%, and the maximum relative error is 6%. In terms of self-supply capability, the self-supply sensor can output maximum voltage are 29 V, a maximum current are 50 nA, and a maximum load power are 110 nW. In the case of 50000 working cycles, its test performance has not significantly decreased, showing high stability.