Breaker with idle running interlock mechanism capable of preventing maloperation

Provided is a breaker with an idle running interlock mechanism capable of preventing maloperation, which comprises a leading screw, a nut, a nut fixing frame, a lead-in lock pin assembly, a lead-out lock pin assembly, an interlock plate assembly and a switch-on drive pin assembly. The leading screw is arranged on a chassis, and the nut is supported upon the nut fixing frame via bearings in two sides; a first bearing and a second bearing are respectively installed in a lead-in lock pin end portion of the lead-in lock pin assembly and a lead-out lock pin end portion of the lead-out lock pin assembly, wherein a spring is sleeved on each of lead-in and lead-out lock pins, the lead-in and lead-out lock pins are mounted in two sides of the nut fixing frame, and working portions of the lead-in and lead-out lock pins match with the nut; an interlock plate of the interlock plate assembly is mounted on a lower support plate via kidney-shaped holes, two ends of a returning extension spring are respectively connected wit