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This utility model discloses an automatic measuring instrument for eyeglass fitting, including a base, a lifting column mounted on the base, an operating screen mounted on the lifting column, a data acquisition device mounted above the operating screen, and a central controller located within the operating screen. The central controller is signal-connected to the data acquisition device, the operating screen, and the lifting column. The operating screen and the data acquisition device move up and down with the lifting column. A subject position area is provided facing the operating screen. The data acquisition device includes a mounting base and a camera component mounted on the mounting base. The operating screen has a front display area, a left display area, a right display area, and a front / back position adjustment display area. The front display area includes a front facial contour area and a frame contour area within the front facial contour area. The front / back position adjustment display area is used to indicate the front / back direction required for the subject's adjustment. This device uses the camera component to identify and acquire facial data from the subject in three directions, thereby automatically generating eyeglass fitting parameters.