Locomotive as well as automatic linkage hooking control method and device

The invention discloses an automatic linkage hooking control method used for a locomotive. The method comprises the following steps of obtaining the initial state of a traction locomotive; when the initial state meets a linkage hooking starting condition, detecting a distance between the traction locomotive and a back trailer; comparing a current distance value with at least two preset distance intervals corresponding to different speed ranges respectively, determining a preset distance interval to which the current distance value belongs, and controlling the traction locomotive to run in the car speed range corresponding to the preset distance interval; when the traction locomotive meets a linkage hooking condition, applying braking to and carrying out linkage hooking operation on the traction locomotive. The invention also discloses an automatic linkage hooking control device used for the locomotive. The invention also discloses the locomotive comprising the automatic linkage hooking control device. By using the automatic linkage hooking control method, linkage hooking operation steps can be simplified; the linkage hooking impact is reduced; the riding comfort of a driver is improved; the operation time wasted due to the failure of linkage hooking is saved.