Provided are a congestion window control method, an apparatus and a device for internet of vehicles. The congestion window control method for internet of vehicle includes: determining a bandwidth requirement for each of the plurality of on-board unit sets; and determining a congestion window for each of the on-board unit sets according to the bandwidth requirements of respective sets of the plurality of on-board unit sets, wherein the plurality of on-board unit sets correspond to a plurality of on-board unit types respectively.