This article dissertates the process of analysis and decision-making in heat-preservation mode between rough and finish roll on 2 250 mm stainless steel hot strip mill in TISCO. Analysing the producing characteristic， ap- plying in the world， cost， energy soucers consumption， characteristic of candidate equipment ect.， the heat-preser- vation mode was chosen. After the item put into production， making use of anticipative effect have been achieved， meet the demand of manufacture.