The invention discloses a power distribution network operation efficiency determination method, and the method comprises the steps: collecting the operation data of all equipment in the power distribution network, and correcting the abnormal conditions in the operation data, so as to eliminate the abnormal conditions; performing efficiency operation according to the operation data to obtain equipment operation efficiency and system operation efficiency of the power distribution network; and storing and displaying the equipment operation efficiency and the system operation efficiency based on the visual tool. Through collecting the operation data of each device in the whole power distribution network in real time and correcting the operation data, the availability of the operation data is ensured. On the basis, the equipment operation efficiency and the system operation efficiency of the whole power distribution network are obtained, the operation condition of the power distribution network can be visually displayed for a user in real time, the accuracy of the operation efficiency is ensured, and convenience is provided for the user to know and manage the operation condition of thepower distribution network. The invention also provides a power distribution network operation efficiency determination device and equipment, and the device and equipment have the above beneficial effects.