The invention relates to a hanging guide mechanism, in particular to a hanging guide mechanism of a horizontal telescopic movable bridge. The hanging guide mechanism comprises a hanging oil cylinder, a joint bearing, a balance arm, a bearing wheel, a guide wheel, a pin shaft and a support seat part, wherein the bearing wheel is connected with the balance arm through a bearing wheel pin shaft, the balance arm is connected with the support seat part through a balance beam pin shaft and can leftwards and rightwards swing, the hanging oil cylinder is arranged on an oil cylinder installing block and is connected with a trolley through an oil cylinder pin shaft, and in addition, a connecting part adopts a joint bearing so that the pin shaft has a certain swinging quantity. The hanging guide mechanism has the advantages that the layout is compact, the structure is simple, and the hanging, the guide and the stable opening of the movable bride are guaranteed. A plurality of sets of hanging guide mechanisms can be combined to be used for meeting the opening and hanging requirements of bridges in different weights.