The utility model discloses an optical-cable fast tester which includes a test instrument and an optical-fiber docking device. The optical-cable fast tester is characterized by including a bottom plate. A section of V-shaped groove is arranged at the middle part of the bottom plate in the length direction. Wire grooves are arranged at the left part and right part of the bottom plate in the length direction. The wire grooves at the left part and right part are both in communication with the V-shaped groove. A left gland, a middle gland and a right gland are arranged at the upper part of the bottom plate. The optical-fiber docking device is compact in design, simple in structure, flexible to operate and convenient to carry. The optical-fiber docking device is used in supporting of an OTDR so that an optical fiber is enabled to be coupled and butt-jointed with a tail fiber temporarily without fusion welding. Compared with the prior art, the optical-cable fast tester saves time in optical-fiber connection and effectively improves work efficiency and reduces test cost and significantly reduces device loss; and the optical-cable fast tester is capable of performing optical-fiber testing at different sites and is especially suitable for inspection of received optical cables and optical-cable fault emergency maintenance and the like.