The invention discloses a multifunctional final impression device, a using method and a digital complete denture manufacturing method. The multifunctional final impression device comprises an upper jaw base, a lower jaw base, an upper jaw dentition, a lower jaw dentition and an external interface, the bottom of the upper jaw base is provided with an upper jaw dentition interface matched with the upper jaw dentition, and the top of the lower jaw base is provided with a lower jaw dentition interface matched with the lower jaw dentition; a tracing plate connector is arranged at the bottom of theupper jaw base, the upper jaw tracing plate is connected into the tracing plate connector to be fixed to the upper jaw base, and a positioner is installed on the upper jaw tracing plate; a positioningplate interface is formed in the top of the lower jaw base, the lower jaw positioning plate is connected into the positioning plate interface to be fixed with the lower jaw base, a positioning needleis mounted on the lower jaw positioning plate, and the lower jaw base is connected with the positioner through the positioning needle; the external connector is arranged at the front end of the upperjaw base and connected with a handle connecting piece or a face arch connecting piece.