According to different storage period, the effect of stacking time on stacking strength was studied with the object of corrugated carton of plan stacking. Using static load experiment method, the relationship between stacking time and transmutation quantity of corrugated carton in the bottom was studied and the relationship equation was got by regression analysis. The forecast method of transmutation quantity of corrugated carton stacked for long was established. The relationship between load bearing enduring time of corrugated carton and dead load was researched, the relationship curve was drawn, and the break time formula of corrugated carton was obtained by regression analysis.