Abstract: Floor water bursting in deep coal seam mining is a complicate nolinear system, and various influencing factors are coupling and influencing themselves. The paper builds the analytic hierachy structure model for floor water bursting in deep coal seam mining, then the judgment matrix is found by the expert scoring method, the contribution weights of the influenced factors are given by the equation analytic hierachy process. Thirteen controlling factors and five main controlling factors are put award by analyzing weights, so the result is basically conform to the field practice. The expert scoring method and analytic hierachy process can convert the objective fact to the subjective cognition, so it is a method that can turn the qualitative into the quantitative. This can be relative objective and correct to study the question of many factors and grey box.