The invention discloses a control method suitable for intelligent load phase change, and belongs to the field of power supply control. The method comprises the following steps that: firstly, confirming one phase with the largest total current after each phase of total current is sorted as a default phase X; after a phase change command is received, according to the phase change command, switchingto a Y phase, and conducting a thyristor X on the default phase; then, disconnecting a contactor X on the default phase; disconnecting the thyristor X on the default phase; conducting a thyristor Y; closing the contactor X; disconnecting the thyristor Y; and therefore, finishing a phase change operation. The control method not only considers a three-phase unbalance degree index but also considersindexes, including voltage, reactive power and the like, and a court is under a stable state with a higher voltage percent of pass and a higher power factor. By use of the control method, a three-phase unbalance problem in the court can be effectively lowered, the loss of a distribution transformer is lowered, a situation that the electric equipment of a user is damaged is lowered, the operation noise of the court transformer is obviously lowered, and customer satisfaction degree is improved. The control method can be widely used for the control and regulation field of power grid operation quality.