The invention discloses a locating device for laser marking of a composite insulator connector. The locating device comprises a control body, a magnet block, the composite insulator connector, a spraying nozzle, a laser marking machine, an electric cylinder, a stepping motor, a single-chip microcomputer control device and a spraying pump. A device body is connected with the outer side of the control body, and a moving plate is installed on the outer side of the device body. A driven gear is fixedly arranged on the lower side of a feeding working disc, and a driving gear is connected with the outer side of the driven gear. A spraying body is fixedly arranged on the outer side of the device body, the spraying nozzle is installed at the upper end of the spraying body, the spraying pump is installed inside the spraying body, and the spraying nozzle is connected with the upper end of the spraying pump. By the adoption of the locating device for laser marking of the composite insulator connector, a conventional punching and label adhesion marking mode can be changed, and therefore the situation that due to punching, an anti-rust protective layer on the outer side of the composite insulator connector can be destroyed can be effectively avoided, and the safe usage process of the composite insulator connector is guaranteed.