Mobile support device

The invention discloses a mobile support device. The mobile support device comprises a traveling frame and at least two groups of longitudinal traveling wheel sets arranged on the traveling frame, wherein, the longitudinal traveling wheel sets comprise reverse guide wheels and hanging roller wheels which are connected together through a transmission mechanism, and the reverse guide wheels are connected with a motor; and support pillar feet needed for forming stable support are arranged under the traveling frame. By utilizing the mobile support device, self-acting movement of a trestle can be realized so as to better adapt to various working conditions, and preliminary works for trestle traveling such as excavation face leveling, steel rail pavement and the like as well as applications of auxiliary equipment in the case of traveling are reduced, thus the device has the advantages of good safety performance and high construction efficiency so as to further shorten construction period.