Delta-tooth-shaped harmonic reducer

The invention relates to the field of harmonic reducers, in particular to a delta-tooth-shaped harmonic reducer. The delta-tooth-shaped harmonic reducer comprises a flexible wheel, a rigid wheel and a wave generator, wherein the wave generator is arranged in the flexible wheel, and outer teeth of the flexible wheel are meshed with inner teeth of the rigid wheel; the outer teeth of the flexible wheel and the inner teeth of the rigid wheel are delta-tooth-shaped. By the adoption of the scheme, the harmonic reducer has the characteristics of steady operation, high bearing capacity and long effective service life.