The invention discloses a novel overhead line system hanging device, solving the problems of complex structure, inconvenience in mounting and maintenance and influence on urban landscape in the prior art. The novel overhead line system hanging device comprises an upright column and a wrist arm connected with the upright column; the wrist arm is connected with a positioning support movably connected with a positioning pipe, such that an included angle between the positioning pipe and ground can be regulated; the positioning pipe is provided with a positioner which can move per se and is used for fixing a contact wire in thermal expansion and cold contracting of the contact wire. By the technical solution, the problems of the prior art can be well solved.