The utility model discloses a step booster frame, comprising a step and a fixed base, wherein the fixed base is fixed on the step; the fixed base is hinged with a rotating frame; the rotating frame is pressed against the step; a left connecting beam of the rotating frame is hinged with a push plate; the push plate is arranged at the left side of the step and inclines downwards; the left end of the push plate is hinged with a lower support frame; the lower support frame is pressed against the ground; a support plate is hinged between a front side plate and a rear side plate of the lower support frame; the support plate is inserted and sleeved into a groove at the back side of the push plate and pressed against the push plate; a hook is fixed on a fixed beam at the left side of the lower support frame; and a hook section of the hook is inserted and sleeved into a connecting ring fixed at the left side of the step. By adopting the step booster frame, a cart can be pushed to the step along the push plate, and does not need to be lifted, so that the step booster frame is convenient and labor-saving.