The invention discloses a roll-cutting tool comprising a machine frame, a control cabinet, a roll-cutting motor, a roll-cutting shaft, a stressed shaft, a templet and an interval adjusting mechanism, wherein the roll-cutting motor, the roll-cutting shaft, the stressed shaft, the templet and the interval adjusting mechanism are installed on the machine frame. The roll-cutting tool is characterized in that the templet is fixed to one side of the machine frame, the roll-cutting motor is fixed to the other side of the machine frame and connected with the roll-cutting shaft, a connecting wire of the roll-cutting motor is connected with the control cabinet, a set of dish-shaped roll-cutting cutters are evenly arranged at one end of the roll-cutting shaft, the back of each roll-cutting cutter is provided with a control mechanism controlling the roll-cutting cutter to stretch or retract, the stressed shaft is arranged under the roll-cutting shaft and provided with stressed wheels which are in fit with the roll-cutting cutters, and the interval adjusting mechanism is in linkage with the roll-cutting shaft. The innovation that the machine frame, the control cabinet, the roll-cutting motor, the roll-cutting shaft, the stressed shaft, the templet, the interval adjusting mechanism and a connection mechanism are combined is achieved, and the roll-cutting tool has the advantages that the universality is good, the roll-cutting cutters are controlled to stretch and retract automatically, the surface of a sealing rubber strip cannot be scratched, and the product quality is good.