The utility model discloses a kind of through passage roof dismounting tool, belong to dismounting tool field, including dismounting tool, bottom plate, the top surface of bottom plate is equipped with auxiliary support mechanism, through setting auxiliary support mechanism, utilize hand wheel,
gear transmission and screw nut cooperation realize the accurate lifting of horizontal support plate, can adapt to different height through passage roof, solve the support problem caused by
height difference of operating personnel, guarantee support stability and security;Electric sucking disc can firmly adsorb roof, need not two people cooperation support, reduce the tacit understanding requirement to personnel, avoid the risk of roof drop or personnel injury due to cooperation failure;At the same time, single-person operation can complete dismounting and subsequent installation, greatly improve operating efficiency, reduce manpower investment and
train downtime, guarantee normal operation order of subway, overall improve the convenience, security and efficiency of through passage roof dismounting operation, and the whole dismounting tool volume is small, convenient in car for mobile operation.