3D printer bottom plate structure

The utility model discloses a bottom plate structure of a 3D printer, and relates to the technical field of bottom plates of 3D printers. The printer comprises a printer bottom plate, and an ejection groove is formed in the top of the printer bottom plate. During use, after a large object is printed and the object is separated from the printer bottom plate, a worker needs to rotate the insertion threaded pipe, the insertion threaded pipe moves towards the side close to the printer bottom plate, the insertion threaded pipe continuously pushes the ejection auxiliary block, the ejection auxiliary block moves towards the ejection chamfering plate, and then the ejection auxiliary block extrudes and pushes the ejection chamfering plate; when the ejection chamfering plate moves upwards, the top of the ejection chamfering plate ejects an object on the printer bottom plate, so that the object moves upwards, the object is separated from the printer bottom plate, and finally, personnel only need to take down the object