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Along with the rapid development of national economy, the cold strip is applied more extensively, and it has higher additional value profit, at present, more and more iron and steel enterprises already or proceed into the cold rolling industry. At the same time, because all industry have become increasingly demanding on strip quality, to face the challenge, cold rollg enterprises must set out from control system overall situation, improve production efficiency, reduce production costs, improve product quality, and adapt to rapidly changing market demand.This article set out the task from the Anshan cold rolling steel continuous annealing line entrance automatic control system, firstly, appropriately introduce entrance technology and automatic control system, gives the project design and explanation about the hardware and software, and then, make staid research and design which are focused on continuous annealing line entrance automatic coiling process control, horizontal and vertical centering control and uncoiling sequence control, uncoiling tension control, cleaning area tension control, and vertical loop position control, tension control, speed master control, and etc, and especially analyze and discuss on the cleaning system of the conductivity ratio control, liquid tank liquid level control, liquid temperature control, brush roller brush control, electrolytic cleaning rectification control, gives the design and description.By running and testing, the results show that the project has good control performance and practicality, the design of the system software and hardware is reasonable, the algorithm is efficient, accurate, and those have the higher reference value to technical personnel who engaged in research on related technology.
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