The embodiment of the invention provides an anti-tear controller, a leveling machine and a control method. The anti-tear controller comprises: a telescopic oil cylinder, an auxiliary press arm, a rotary shaft, a press arm, a press roll, and a controller; the telescopic oil cylinder is also electrically connected to the controller, and the telescopic oil cylinder is provided with a telescopic arm and a rotary supporting shaft; the telescopic arm is connected to one end of the auxiliary press arm; the other end of the auxiliary press arm and one end of the press arm are both connected to the rotary shaft, a first angle is preset between the auxiliary press arm and the press arm, and a second angle is preset between the connecting line between the center of the rotary shaft and the center ofa coiled strip and the connecting line between the center of the rotary shaft and the center of the rotary supporting shaft; the other end of the press arm is connected to the press roll; according tothe coil diameter of the coiled strip, the distance between the outer surface of the press roll and the outer surface of the coiled strip, controller parameters and measured parameters, the controller obtains control parameters, a control signal is then transmitted to the telescopic oil cylinder according to the obtained control parameters to control the pressing position of the press roll, and thereby the problem that strip is torn apart in the production process of cold-rolling a strip can be solved.