Demountable underframe of cableway tractor

The utility model relates to parts of a cableway tractor, in particular to a demountable underframe of the cableway tractor. The demountable underframe comprises a power mechanism mounting underframe and a traction executing mechanism mounting underframe, channel steel connecting sections in mutual correspondence are arranged on two sides of a connecting end face of the power mechanism mounting underframe and the traction executing mechanism mounting underframe respectively, and connecting blocks are welded at the outer ends of the channel steel connecting sections on two sides of the power mechanism mounting underframe, penetratingly disposed in C-shaped grooves of corresponding channel steel connecting sections on two sides of the traction executing mechanism mounting underframe respectively and fixed through bolts. By the demountable underframe, the cableway tractor can be demounted during transporting and can be assembled again when arriving at a construction site, so that convenience is brought to transporting, transporting efficiency is raised, and construction progress is accelerated.