The invention relates to a method for controlling the pump flow. The method specifically comprises the following steps that A, a flow adjusting command of a user is obtained through a signal receivingand transmitting module; B, the history record in a storage chip is queried, whether the required flow numerical value of the user is smaller than an existing flow numerical value or not is judged, if the required flow numerical value of the user is smaller than the existing flow numerical value, the rotating speed of a pump motor is decreased, if the required flow numerical value of the user islarger than the existing flow numerical value, the rotating speed of the pump motor is increased, and an executor drives an adjusting valve to reach the opening degree; C, the opening degree of the adjusting valve in the step B is collected through flow signal collecting equipment; and D, collecting data in the step C are compared with the flow adjusting command of the user, and the opening degreeof the adjusting valve is corrected again. The structure is simple, using is convenient, and the numerical value of the pump flow can be accurately and efficiently measured.