The invention relates to an oil well oil outlet speed detecting device, and belongs to the technical field of oil extraction. The oil well oil outlet speed detecting device comprises an oil conveyingpipeline for detection and an ultraviolet detector, wherein the oil conveying pipeline for detection comprises a conventional oil conveying pipeline and a detection pipeline; the ultraviolet detectorcomprises a solar cell panel, a storage battery, an ASE broadband light source, an input monomode optical fiber, a ZnO nanorod-micro-nanometer optical fiber mixed hybrid waveguide, an output monomodeoptical fiber and an spectrometer. The technical goal of detecting the oil well oil outlet speed can be realized.