The invention provides a rolling technique for rolling a steel plate of 6mm by using a middle-thickness rolling mill which carries out corresponding settlements on the furnace discharge temperature of a stock, the stock thickness, rolling gates, an automatic gauge control, a rolling force, the self-adaptation coefficients of the rolling force between the gates, an opposite convexity and the matching between the linear speed of a transmission roller gate and the linear speed of the working roller of a rolling mill. The technique solves the problems of waves, bending, camber, frame scraping and waste rolling appearing in the plank stuffs during the testing rolling of 6mm plates of the existing middle-thickness rolling mill, leads the rolling to be stable and can manufacture qualified products in batch.