According to the technical scheme, the automobile injection molding part conveying device comprises a bearing body, at least the two ends of the bearing body are provided with a lifting mechanism and/or a hinge piece respectively, the hinge piece is hinged to a hinge support, and the lifting mechanism drives the bearing body to rotate by a certain angle around the hinge support and is in an inclined state. The conveyed object is conveyed on the bearing body through the gravity of the conveyed object, and when conveying is completed, only the bearing body needs to be adjusted to be horizontally arranged, and the conveyed object loses power and does not move forwards any more. The whole structure is simple, and the conveyed object does not need to be driven to run. The hinging position of the device can be changed through the clutch, so that the bearing body slides bidirectionally. Sliding between the friction blocks and the guide rail is adopted to replace rolling of the trundles on the guide rail, the falling speed of the conveying vehicle on the guide rail can be effectively reduced, and risks caused by inertia can be effectively avoided after the guide rail is turned from an inclined position to a horizontal position.