The application discloses a positioning method and a positioning device for the connection of a
tractor and a trailer, and belongs to the technical field of vehicles. The positioning method comprises the following steps: obtaining the distance D11 between a first
base station and a first tag through communication between the first
base station and the first tag, obtaining the distance D12 between the first
base station and a second tag through communication between the first base
station and the second tag, obtaining the distance D21 between a second base
station and the first tag through communication between the second base
station and the first tag, and calculating the spatial relative position coordinate information of a
saddle and a connecting rod according to D11, D12 and D21. When the
tractor and the trailer are connected, the relative position relationship between the
saddle and the connecting rod can be determined through the positioning method, so that the
tractor and the trailer are connected, and the risk of collision between the tractor and the trailer is reduced. Meanwhile, the relative position between the
saddle and the connecting rod can be obtained through two base stations and two tags, so that the number of base stations and tags is reduced, the arrangement cost is effectively reduced, and the occupied space is reduced.