Power adapter capable of preventing plug from falling off

The utility model belongs to the technical field of power adapters, and particularly relates to a power adapter with an anti-drop plug, which comprises an adapter body with a computer connector, one end of the adapter body is provided with the plug, and one end of the plug is connected with a triangular connector. An interface is formed in one end of the adapter body, a liftable limiting block is mounted at the bottom of the interface, and a spring is connected between the limiting block and the interface; when one end of the triangular connector is inserted into the connector, one end of the limiting block is conveniently inserted into the triangular connector, the limiting block which is located on the triangular connector and matched with the connector is arranged, and when one end of the triangular connector is inserted into the connector, the limiting block is inserted into the triangular connector under the action of the spring; therefore, one end of the triangular joint is limited in the interface, and