The invention provides a cutting rotational plate of rotational plastic bottle automatic slotting machine, belonging to the mechanical technique, which can solve the problems of present technique that removed part dispersed and complex structure. Said invention is arranged at one side of blade bracket, which comprises one rotational shaft, while the upper and lower rotational plates that rotate with the rotational shaft are mounted on the rotational shaft; the edges of upper and lower rotational plates individually have several uniform distributed concaves, which are one-to-one correspondence; a friction wheel is arranged between the upper and lower rotational plates; the external edge of friction wheel is smaller than the external edges of upper and lower rotational plates which it can independently rotate with a wheel shaft. The invention can make the cut of plastic bottle flat, with high cutting efficiency, simple structure and easy installment. |