The invention discloses automatic protective agent spraying and brushing equipment for a vacuum arc-extinguishing chamber. The automatic protective agent spraying and brushing equipment for the vacuum arc-extinguishing chamber comprises an automatic protective agent spraying and brushing platform, a curing transmission line, a first conveying manipulator, a second conveying manipulator and an air processing device, wherein a sealing cover is arranged outsides the whole set of equipment; the air processing device is arranged at the top part of the sealing cover; a constant-temperature heating device is installed on the side wall of the sealing cover; the automatic protective agent spraying and brushing platform is arranged at one end of the curing transmission line; the first conveying manipulator is arranged on the side of the automatic protective agent spraying and brushing platform; and the second conveying manipulator is arranged above the connection part of the automatic protective agent spraying and brushing platform and the curing transmission line. According to the automatic protective agent spraying and brushing equipment, the automatic brushing work of automatically brushing the end surfaces and the arc surfaces of cover plates at the two ends of arc-extinguishing chambers in various specifications is realized, and the labor intensity of workers is lowered; spraying, brushing and curing are finished in a sealing room; and discharge air can meet the relevant Chinese national standard when rapid curing of a protective agent of the end surfaces of the arc-extinguishing chamber after spraying is finished is ensured, and the human health and the natural environment are not damaged.