The invention provides a permanent-magnet synchronous power generator and a permanent-magnet synchronous wind power generation system. The permanent-magnet synchronous power generator comprises a stator and a rotor, wherein N sets of windings are arranged in a groove of the stator in a winding way, each set of winding comprises three three-phase windings which are isolated in neutral points, the three three-phase windings are different by a preset electric angle, and the N is an integer larger than or equal to 1. By the permanent-magnet synchronous power generator and the permanent-magnet synchronous wind power generation system, the current harmonic can be reduced, the problem of ring current brought by parallel capacity expansion is solved, the capacity of the power generator is improved, and the running reliability is improved.