An angular contact self-aligning roller bearing, including rollers, an inner ring, a cage, an outer ring, an outer raceway and an inner raceway. The outer raceway is an inner spherical surface. A spherical center of the inner spherical surface is located on an axis of the outer ring and deviates from a central point of the outer ring. The rollers are in a single row. A working surface of each roller is an externally convex surface, which is formed by rotation of a first circular arc as a generatrix around an axis of each roller as a rotation axis. The inner raceway is an internally concave surface, which is formed by rotation of a second circular arc as a generatrix around an axis of the inner ring as a rotation axis. The bearing can withstand separate loads or combined loads in axial and radial directions, and adapt to misalignment.