The invention discloses a trunk cover plate device with an automatic paper release function. The device comprises a trunk cover plate and a paper release machine connected with the trunk cover plate. The paper release machine comprises an upper cover and a lower cover. One side of the lower cover is connected with the upper cover through hinges, and the other side of the lower cover is connected with a clamping groove formed in the upper cover through a buckle. The upper cover is connected with the trunk cover plate. An elastic device and a drive device are arranged and installed in the upper cover. The elastic device is connected with the drive device. The drive device is connected with a power supply and a control switch arranged at the outer side of the upper cover. A paper box and an elastic device are installed in the lower cover. The elastic devices are connected with the paper box. The paper box is located at the lower side of the drive device. The trunk cover plate device with the automatic paper release function has the advantages of being novel in design, reasonable in structure, and convenient to use. The paper release machine is installed in the vehicle trunk cover plate, when the paper is needed, the paper in the paper release machine can be controlled to be released automatically through the control switch, and therefore the convenience in use is enhanced.