The present application provides a flexible display device, including a housing, at least one winding mechanism, a flexible display screen and at least one stretching mechanism. When the flexible display screen is in a first state, the stretching mechanism pulls the winding mechanism to pull the flexible display screen out of the winding mechanism; when the flexible display screen is in a second state, the stretching mechanism pulls the winding mechanism to receive the flexible display screen into the winding mechanism. The flexible display device is smaller in size by winding the flexible display screen in the housing.