Cutting knife for grooving paper box

The cutting knife comprises a vehicle body, the two opposite sides of the vehicle body are each rotationally connected with two rolling wheels, the rolling wheels support the vehicle body, a handle is arranged at the top of the vehicle body, a knife edge is arranged at the bottom of the vehicle body, a telescopic arm is connected to the side wall of the vehicle body, and the telescopic arm is arranged on the side wall of the vehicle body. The end, away from the trolley body, of the telescopic arm is connected with a limiting plate, the limiting plate is used for abutting against the edge of a paperboard, and the blade cuts the board face of the paperboard. The machining efficiency of the grooving procedure can be improved. 本申请公开了一种用于纸盒开槽的切割刀，包括有车体，所述车体的相对两侧均转动连接有两滚轮，所述滚轮支起所述车体，所述车体的顶部设置有把手，所述车体的底部设置有刀刃，所述车体的侧壁连接有伸缩臂，所述伸缩臂远离所述车体的一端连接有限位板，所述限位板用于抵接纸板的边缘，所述刀刃切割纸板的板面。本申请可提高开槽工序的加工效率。