Traction trailer folding control method, device and equipment and traction trailer

The invention provides a traction trailer folding control method, device and equipment and a traction trailer. When it is determined that the traction trailer is in a folding starting state, if the sum of a headstock trailer included angle and a headstock front wheel included angle is larger than a preset included angle, a preset compensation coefficient is obtained, and the preset compensation coefficient is adopted to correct the target rotating speed of an engine; and the traction trailer is controlled to conduct folding starting at the corrected target rotating speed, so that the engine rotating speed in the folding starting process is increased, and the success rate of folding starting is increased. 本发明提供一种牵引挂车折叠控制方法、装置、设备和牵引挂车，当确定牵引挂车处于折叠起步状态时，如果车头挂车夹角与所述车头前轮夹角之和大于预设夹角，则获取预设补偿系数，采用所述预设补偿系数对发动机的目标转速进行修正，控制牵引挂车采用修正后的目标转速进行折叠起步，从而增大了折叠起步过程中的发动机转速，提高了折叠起步的成功率。