The invention belongs to the field of equipment cabinets, and discloses an equipment cabinet anti-toppling mechanism in linkage with a plug-in box. The equipment cabinet anti-toppling mechanism in linkage with the plug-in box is characterized comprising two sets of anti-toppling units which are symmetrically arranged left and right; each set of anti-toppling unit comprises a front inclined wedge,movable supporting legs, a guide rail piece, a rolling column, a shifting tongue, a rear inclined wedge, a shifting fork, a shifting fork pin shaft and a shifting tongue pin shaft; the front inclinedwedges are provided with a plurality of plugging tenons and a plurality of front bosses; the guide rail pieces are installed at the bottom of an equipment cabinet; each movable supporting leg comprises a vertical strip and a cross strip arranged at the bottom of the vertical strip; the vertical strips are provided with the shifting tongues; each shifting tongue is provided with a plurality of tenon holes; each shifting tongue is further provided with a shifting segment; and the shifting forks are placed on the rear inclined wedges and can move on second bevels. According to the equipment cabinet anti-toppling mechanism in linkage with the plug-in box, due to the pull-out and plug-in action of the plug-in box, hiding on the two sides of the equipment cabinet is achieved, the space of the plug-in box in the equipment cabinet is not occupied, the anti-toppling function of the equipment cabinet is achieved, an anti-toppling mechanism performs linkage along with the plug-in box, other extraoperation is not needed, and circulating and carrying are convenient.