The invention provides a method for testing producing profiles of a horizontal well through a coiled tubing optical fiber technology. The method comprises the following steps of type selection of coiled tubings and optical fibers, mounting of the optical fibers penetrating through the coiled tubings, testing operation, mounting and pressure testing operation of the continuous oil pipes, debuggingand rectifying of a data collecting system, putting down of the continuous oil pipes to target positions, determining of testing schemes and relevant parameters, testing of the optical fiber producingprofiles and collecting of data, extracting, dividing, fitting, rectifying and treatment of the data, and analyzing and explaining of the data. According to the method provided by the invention, no logging instrument is arranged, the continuous oil pipes are applied to put down the testing optical fibers to target layers, real-time monitoring of a whole shaft for 24 h is achieved accordingly, theproducing profiles of all tested well sections of the horizontal well and the producing contribution of all the producing layers are obtained, the well diameter limitation of putting down of producing oil pipes or large-drift-diameter bridge plugs in the well shaft can be overcome, or the problem of large construction difficulty of testing of the producing profiles of the large-slope horizontal well is solved.