The invention relates to a columnar and hollow porcelain insulator outer surface anti-pollution-flashover coating spraying device. A drive device is fixed to one end of a base, and a support is fixed to the other end of the base. A left chuck is fixed to an output shaft of the drive device. A bearing block is fixed to the upper end of the support. A right chuck is fixed to the bearing block. The right chuck and the left chuck are coaxial. A workpiece can be detachably fixed between the left chuck and the right chuck. A guide rail frame and a supporting rod are arranged above the workpiece. The two ends of the guide rail frame are fixed to the drive device and the support, and the two ends of the supporting rod are fixed to the drive device and the support. The guide rail frame is provided with a drive trolley. A spraying head is fixed to the drive trolley and communicates with an outlet of a conveying pump through a hose in a sealing manner. The hose is hung on the supporting rod. An inlet of the conveying pump communicates with a bin in a sealing manner. A material collecting hopper is arranged below the workpiece. The bottom of the material collecting hopper communicates with the bin. The columnar and hollow porcelain insulator outer surface anti-pollution-flashover coating spraying device is simple in mechanism, convenient to operate, low in equipment cost, low in labor intensity of workers, capable of saving coatings and good in environment friendliness.