Optical fiber connection assembly

The invention relates to the technical field of optical fiber erection, and discloses an optical fiber connection assembly which comprises an outer sleeve and an optical fiber, the optical fiber is divided into a cladding on the outer side, an additional inner core on the inner side and a coating layer on the additional inner core, a movable cavity I and a movable cavity II are formed in the two ends of the outer sleeve respectively, a pre-embedded device is arranged in the outer sleeve, and the movable cavity I and the movable cavity II are communicated with the pre-embedded device. And a reciprocating cavity communicated with the movable cavity I and the movable cavity II is formed in the outer sleeve. The two ends of the outer sleeve are blocked through the piston seat I and the piston seat II, so that an optical fiber can only be inserted through a central through hole of the piston seat II to complete optical fiber connection, the outer sleeve does not need to be opened to access the optical fiber, and t