The invention discloses a method for predicting the changes of a rolling pressure with the changes of a rolling speed in a cold rolling process. The method comprises the following computer executed steps: (1) collecting main equipment and technological parameters of a cold continuous rolling unit; (2) calculating an elastic flattening radius of a working roller; (3) calculating the temperature of emulsion in the rolling process for producing products of the typical specification under the current working condition; (4) calculating power viscosity of a lubricant; (5) calculating dynamic oil film thickness in rolling of a smooth roller; (6) calculating the friction coefficient in the rolling process under the current working condition; and (7) calculating the rolling pressure under the current working condition. The method disclosed by the invention can realize on-line prediction of changes of the rolling pressure in a speed increasing and reducing process and can be used for monitoring the change condition of the rolling pressure in the speed increasing and reducing process in real time so as to provide a control strategy in time, so the rolling pressure fluctuation degree is greatly alleviated, on-site workers can be provided with an on-line rapid early warning mechanism, and the surface quality and strip shape accuracy of strip steel are guaranteed.