Production method of multicolor pattern color steel plate

The invention provides a production method of a multicolor pattern color steel plate. For the once transfer printing, on one hand, a PLC (programmable logic controller) control module in a servo control system is used for computing the theoretical roller surface linear velocity of each roller in a roll coater set by acquiring the technical velocity and the rotation velocity of each roller in the roll coater set, and enables the theoretical roll surface linear velocity to be accordant with the technical rotation velocity; and on the other hand, a servo control module with a coder acquires the practical roller surface linear velocity of each roller in the roll coater set, and inputs the practical roller surface linear velocity into the PLC control module, so that a PLC control system can be used for comparing the practical roller surface linear velocity with the theoretical roller surface linear velocity, and adjusting the current frequency till the practical roller surface linear velocity is accordant with the theoretical roller surface linear velocity. According to the control method, the practical roller surface linear velocity is adjusted to be accordant with the theoretical roller surface linear velocity, and the theoretical roller surface linear velocity is adjusted to be accordant with the technical velocity, so that the practical roller surface linear velocity is adjusted to be accordant with the technical velocity, and furthermore, the adjustment by stopping a production line does not need in the process of production, so that the production efficiency can be improved.