Abstract: A method and device for simulating a production duration of a silicon-wafer slicer, including: constructing a slicer simulating model, wherein the slicer simulating model includes process-step data of the slicer, and the process-step data include: a loading process step, a cutting process step, a discharging process step, a rinsing process step, a waiting process step, a broken-line replacing process step, a guide-pulley replacing process step, a home-roll replacing process step and a paying-off-wheel replacing process step; in the slicer simulating model, according to a predetermined rule, obtaining a process-step-to-be-executed datum; according to historical data, for the process-step-to-be-executed datum, assigning duration data that individually correspond to the process-step-to-be-executed data, wherein the historical data include: historical duration data that individually correspond to the process-step data of the slicer; and executing sequentially the process steps in the process-step-to-be-executed d