The invention relates to a flexible connection type downhole instrument traction device. The flexible connection type downhole instrument traction device comprises an anchoring device assembly and a traction device assembly, wherein the anchoring device assembly and the traction device assembly are in front-and-rear connection, a flexible cable penetrates through the anchoring device assembly and the traction device assembly, and one end of the flexible cable is electrically connected to a traction device control device. The anchoring device assembly comprises a first shell, wherein anchoring slips and a driving wheel set are arranged on the first shell, a first through hole is formed in the rear end of the first shell, a fixed hole base is arranged at the rear end of the interior of the first shell, and the flexible cable penetrates through the first through hole and is fixedly connected to the fixed hole base. The traction device assembly comprises a second shell, wherein a second through hole is formed in the front end of the second shell, a cable arrangement device is arranged at the front end of the interior of the second shell, and the flexible cable penetrates through the second through hole and is wound around the cable arrangement device. The flexible connection type downhole instrument traction device has the advantages of being high in adaptability to pipe diameters of testing wells, high in safety, accurate in locating, simple in structure and low in cost, and convenient to repair.