In light of the elastic thin plate theory , the author induced equilibrium differential equation of bi - direction cellular slab , which was proved correct through analysis and comparison to result of ansys to with theoretical calculation . through the deflection and bending moment coefficient calculation of bi - direction cellular slab under various boundary conditions , the author brought forward the theory that the deflection of mid - span and bending moment coefficient calculation of mid - span and support of bi - direction cellular slab could be in accordance with solid plates " , which could satisfy the precision of engineering 本文根据弹性薄板理论,导出了双向空腹板的平衡微分方程,并通过理论计算和通用有限元程序ansys结果对比,验证了其正确性;通过对各类边界条件下双向空腹板挠度和弯矩系数的计算比较,本文提出:双向空腹板跨中挠度及跨中、支座弯矩可使用本文空腹板刚度公式查找现有的实心板挠度弯矩系数表进行计算,完全能满足工程精度要求。