The invention discloses a lifting foot stool of a conveyor. The lifting foot stool comprises a fixing plate; four or more groups of stand columns distributed symmetrically at equal distances are connected on the lower side of the fixing plate; an anti-skid pad is arranged at one end, far away from the fixing plate, of each stand column; a programmable logic controller (PLC) is arranged on one sideof the fixing plate; two groups of clamping plates distributed symmetrically are connected in the middles of the stand columns; the clamping plates are connected with clamping holes through hexagon bolts; a fixing ring is arranged on one side, close to an electric telescopic rod, of each clamping plate; and two sides of each fixing ring are connected with the corresponding clamping plate throughtriangular ribs. The height of the conveyor can be adjusted through the electric telescopic rods arranged in the middles of the upper sides of the clamping plates, the height adjusting precision is relatively high by the aid of an infrared distance meter, thus the actual production requirements can be met, and the great convenience is brought to production; and the conveyor can be more stable during use through matched use of sliding platforms and sliding grooves and supporting rods arranged between the sliding platforms and a supporting plate.