Device for spraying anticorrosive paint in pipeline

A spraying device for anticorrosive paint in a pipeline is characterized in that a circular support is coaxially fixed to a supporting rod, the outer diameter of the circular support is smaller than the inner diameter of the pipeline, a plurality of telescopic rods distributed in the radial direction are installed on the outer side of the circular support, the telescopic rods are evenly distributed with the circular support as the center, and the telescopic rods can freely stretch out and draw back in the length direction; a locking device capable of locking the telescopic length of the telescopic rod is arranged on the telescopic rod, the spraying mechanism comprises a rotating spray head, an air compressor driving the rotating spray head to rotate and providing spraying air pressure and a storage tank providing paint for the rotating spray head, and the rotating spray head is installed at the end of the supporting rod. The rotating spray head comprises a plurality of rotating arms and a plurality of materia