The utility model relates to a track vehicle gunning device for repairing the dipping tube of RH vacuum furnace; the utility model connects a lower platform with a track baseplate fixedly, an upper platform is connected with the lower platform through a lifting vertical post, the lifting vertical post is a sleeve type hydraulic structure, a horizontal moving mechanism is connected with the upper platform, a lifting mechanism is arranged on the horizontal moving mechanism, a turning mechanism is arranged on the lifting mechanism, a spraying gun is arranged on the turning mechanism; the utility model solves the problem in the prior art where the operation range of the track-based trolley equipment is limited by the track, so far the multi-station changeover type RH vacuum furnace is concerned, the equipment efficiency is low, a waste is caused to maintenance equipment configuration or a waste is caused due to that each station has to be configured or RH using lifecycle is impacted due to that some station does not get maintenance equipment; the utility model is the mobile device which can be freely transported, and can exert the advantage of high efficiency when RH vacuum furnace is arranged in multi-station manner, and can conduct the gunning operation on powder automatically or manually, and can save the investment and the operation cost of equipment configuration.