The relationship between the karst development features and the water gushes are presented in detail and assessment criteria is proposed; it is proposed that the karst water gushes are related to the atmospheric temperature, rainfall and rainfall intensity and the stress distribution caused by the construction; the water gushing mechanisms, such as the tensioning failure of the watersealing rock columns, the shearing failure of the fissures, the hydrodynamic expansion of the fissures and the stabilitylosing failure of the ground, are expounded by means of numerical analysis and theoretical analysis; the estimation of the water gushing quantity and the water gushing pressure, as well as the karst treatment technology, are presented.