The utility model discloses a tool clamp and a capacity grading cabinet, and relates to the technical field of capacity grading cabinets. The tool clamp comprises a rotary abutting piece, an elastic piece and a limiting piece. The limiting piece is provided with a cavity, a stretching-out opening and a sliding opening, the stretching-out opening and the sliding opening are opposite in position andcommunicate with the cavity, and the cavity is provided with an abutting face. The rotating abutting piece comprises a rotating part, an abutting part and an extending part which are arranged in sequence. the rotating part extends out of the sliding opening and can slide relative to the sliding opening; the abutting part is located in the cavity and used for abutting against the abutting face when the rotating part rotates, the elastic piece abuts against the portion between the abutting part and the inner wall, close to the stretching-out opening, of the cavity, the extending part is in sliding connection with the stretching-out opening, and the extending part is used for stretching out of the stretching-out opening when the rotating part slides relative to the sliding opening. The utility model also provides a capacity grading cabinet comprising the tool clamp. The tool clamp and the capacity grading cabinet provided by the utility model can shorten the loading time of the battery,accelerate the process progress of the battery, increase the utilization rate of the capacity grading cabinet, save energy and reduce consumption.