The invention provides an operation control method for precise electrolytic machining. By identifying and controlling basic parameters of an electrolyte, calculating parameters of various machining states, and precisely controlling a machining voltage, a pulse duty factor and a feeding speed, electricity demand corresponding to machining intervals is met, so that steady-state electrochemical reaction is realized. According to the operation control method for precise electrolytic machining, the parameters of the electrolytic machining states are calculated, and a pulse power is precisely controlled, so that the machining intervals and the corresponding machining voltage, electric current density and feeding speed are controlled; the automatic control method for the machining intervals is completely solved; stable constant-interval machining is maintained; and various machining precision requirements of different materials are finally realized.