The invention discloses a device for bending the support legs of an inner cup of a magnetic steel temperature limiter. The device is capable of automatically bending the support legs of the inner cup, thereby increasing the working efficiency on the premise of ensuring the working quality. The device for bending the support legs of the inner cup of the magnetic steel temperature limiter comprises a rack provided with a horizontal table surface, wherein a plurality of limit through holes corresponding to the support legs of the inner cup to be machined in position and angle are formed in the table surface; a punch pin and a drive mechanism used for driving the punch pin to carry out horizontal reciprocating motion are installed on the rack and at the side of each limit through groove; and a projection is arranged at the top end of each punch pin, and the movement path of the projection passes through the space below the corresponding limit through groove. The plurality of support legs of the inner cup are inserted downwards into the corresponding limit through grooves simultaneously after the inner cup is assembled with an outer cup, then the projections of the punch pins move outwards through the limit through grooves, and the projections of the punch pins drive the parts to be bent, of the support legs of the inner cup, to move, so that the parts to be bent, of the support legs of the inner cup, are bent.