one of the connectors is connected with the electric power output shaft of the model airplane and the other connector is connected with the propeller of the model airplane one of the two connectors is an elastic component provided with an opening slot and the two connectors are coaxially connected and can rotate together but can be conveniently separated from each other when impacted by external force so as to put the propeller under effective protection application_number US 201013395781 A description further detailed description is made below to the embodiments of the present invention with reference to the drawings the connector having the function of protecting the propeller of model airplane provided by the present invention is used for connecting the electric power output shaft including motor shaft and final stage driven gear shaft of motor powered reducing system with the propeller the propeller connector comprises two separable connectors with one being connected with the propeller and the other being connected with the electric power output shaft the basic working principle of the connector is as follows embedded locking between the two connectors is realized by means of elastic deformation of the connector material so as to transfer motor power to the propeller.