An integrated high-return-loss optical component adapter comprises a plug type adapter part, a ceramic plug core, a positioning metal ring and a ceramic sleeve. The plug type adapter part comprises a front base, a rear base and a clamping base. The front base is provided with a bottom plate A, a protruding structure and a step-shaped through hole penetrating the bottom plate A and the protruding structure. The rear base is provided with a bottom plate B and a cylindrical shell, and the bottom plate A and the bottom plate B are connected in a matched mode. The clamping base is provided with a bottom plate C, a limiting sleeve and an elastic clamping plate, and the bottom plate C is pressed to the bottom plate A through the rear base. The positioning metal ring is arranged in the portion, in the protruding structure, of the through hole in a sleeved mode. The two ends of the ceramic sleeve are inserted in the portion, in the bottom plate A, of the through hole and the limiting sleeve respectively. The ceramic plug core and the positioning metal ring are in interference fit, and one end of the ceramic plug core is inserted in the ceramic sleeve. By means of the integrated high-return-loss optical component adapter, the ceramic plug core, the ceramic sleeve and the plug type adapter part can be integrally and coaxially assembled, the structure is compact, a connector is universal, installation and use are convenient, optical performance is good, and the integrated high-return-loss optical component adapter is widely applied to the fields of optical communication modules and photoelectric detectors.