Vehicle heat exchange system, control method and device and vehicle

The invention relates to the technical field of vehicles, and particularly relates to a vehicle heat exchange system, a control method and device and a vehicle. The vehicle heat exchange system comprises a first heat exchange subsystem, a second heat exchange subsystem and a three-way reversing valve. The first heat exchange subsystem comprises a first circulation loop; the second heat exchange subsystem comprises a second circulation loop; the three-way reversing valve comprises a first connector, a second connector and a third connector; the first connector and the second connector are connected into the first circulation loop; and the first circulation loop is provided with a first conduction point, the second circulation loop is provided with a second conduction point and a third conduction point, the first conduction point is in conduction connection with the second conduction point, and the third conduction point is in conduction connection with a third interface. The three-way reversing valve is adopte