The invention discloses a multi-output switching converter with high efficiency and high accuracy, belonging to the technical field of a switching power supply. A drain of a switching tube M1 is connected with a positive electrode of a power supply Vs, a source of the M1 is connected with a non-dotted end of a first secondary winding of a T1 and a dotted end of a primary winding of a T2, a gate of the M1 is connected with a dotted end of the first secondary winding of the T1, a source of an M2 is connected with a negative electrode of the Vs and a non-dotted end of a second secondary winding of the T1, a drain of the M2 is connected with a dotted end of a primary winding of a T2, a gate of the M2 is connected with a dotted end of the second secondary winding of the T1, a residual current device (RCD) clamping circuit is arranged between connection points of the drain of the M1 and the non-dotted end of the primary winding of the T2, a RCD clamping circuit is arranged between connection points of the source of the M2 and the dotted end of the primary winding of the T2, and the two secondary windings of the T2 are respectively connected with a main output circuit and an auxiliary output circuit. By using the dual RCD clamping circuits, the input can be enabled to change in a relatively wide range, and the auxiliary output voltage can be accurately adjusted.