Abstract: In developing thin-layered bottom-water drive oil reservoir, oil wells penetrate many oil layers vertically. In decision-making of separate injection commingled production, grouping of commingled production of multiple layers is based on formation classification without systemic and measurable study. So re-search into the adaptability of separate injection commingled production is important. Setting up dual layers model without crossflow, this paper applies numerical value simulation method, single parameter and posi-tive crossed parameter analytical method to obtain technical finitude equation about choking back bottom-water of thin-bedded bottom-water oil reservoir and the correctness of plate analytical method through examples is proved. It is also proved that the method can offer an academic tackle to choking back bottom-wat-er in exploiting thin-bedded bottom-water oil reservoir and improve the effect of separate injection commingled production technology.