In the three-dimensional value simulations for pumping and dewatering,the processing for pumping well is a difficulty.To process the pumping well as a series of virtual units could simulate the changes between the drawdown and the time in each point of the calculating region,research the law of water movement,solve the pumping of group wells at constant rate under the condition of the random boundary,forecast the phreatic surface,instruct the construction progress and appraise the rationality of the water lowering plan.