Three-dimensional line printing device and three-dimensional line printing method

The invention relates to a three-dimensional line printing device and a three-dimensional line printing method. The three-dimensional line printing device comprises a holding tank, an injecting module, a platform, a curing module and a control module. A molding area and a release area are arranged at the inner bottom of the holding tank, and are in a step form; and the molding area is higher thanthe release area. The injecting module comprises a storage tank, and an injecting pipe connected with the storage tank; a molding material is used for filling the injecting module; and as the injecting pipe passes through the molding area, the molding area is coated with the molding material. The platform is movably arranged above the inner bottom of the holding tank. The curing module is arrangedbeside the holding tank or the platform, and is used for curing the molding material between the platform and the molding area to form a curing layer on the platform. The control module is electrically connected with at least