The invention discloses a door locking device opened and closed by electric control. A controller area network (CAN) communicating module of a left front door locking control unit receives locking/unlocking signals of an automobile remoter, automobile speed signals and automobile acceleration signals, and transmits the signals to a left front door controller to process and sends door state indicating signals simultaneously. An outer communication module in the left front door locking control unit is connected with a right front door locking control unit through a bus, the outer connecting module is connected with an inner door opening button, an outer door opening button, an inner door opening setting button, an outer door opening setting button, an inner door opening setting indicator light and an outer inner door opening setting; and a lock body connecting module comprises a door-state indicating signal switch and a door lock outer locking switch, receives executive instructions from the controller and drives a door lock electric executive device to operate. The traditional mechanical control method of operating an inner handle/an outer handle to open a car door can be replaced, and instructions sent out by the electric control device can be received by the electric executive device to electrically open the car door.