Abstract: In order to solve the problem of excessive manual intervention in the process of continuous hot-dip galvanizing roll coating, the chemical roll coating machine of hot-dip galvanizing unit was taken as the research object. Firstly, aiming at the complex characteristics of the roll coating treatment in the industrial production process, the automatic control and enhancement scheme based on the existing equipment capacity of the roll coating machine was formed. Secondly, the control model based on multi-factor coupling of industrial production was constructed, and the dual flexible control module of pressure and position was developed to meet the requirements of high-precision adjustment of roll coating process. Finally, the core database of the automatic control system was established, the system link program and transmission control parameters were optimized. At the same time, this technology was applied to a hot-dip galvanizing roll coating machine, achieved an automation rate of over 90% per month and reduced manual operation and lowered the scrap rate. This technology ensured precise adjustability and uniformity of coating weight of the strip. It met the requirements of downstream customers for the surface roll coating quality of hot-dip galvanized products, improved the automatic control level of the roll coating machine, and created considerable economic and social benefits.