Wheel-track composite carrying trolley

The invention discloses a wheel-track composite carrying trolley which comprises a trolley body, a suspension assembly, a wheel assembly and a wheel hole type track, and the suspension assembly, the wheel assembly and the wheel hole type track form a composite driving system of the carrying trolley and are symmetrically arranged on the left side and the right side of the trolley body. The suspension assembly comprises a front suspension, a rear suspension and a longitudinal adjusting oil cylinder, the suspension is also provided with an oil cylinder and is connected with the trolley body and the wheel assemblies, the wheel base of the wheel assemblies is adjusted through the suspension assembly, the wheel hole type crawler can be integrally arranged on the two wheel assemblies on the same side in a sleeving mode, and crawler-type running of the carrying trolley is achieved. The crawler belt can be replaced at any time, disassembly and assembly are convenient, and other mechanisms do not need to be changed dur