The utility model discloses a telescopic emergency bridge, which comprises a transportation operation vehicle, a bridge body, a hydraulic system, a supporting plate and a control cable system, wherein the bridge body comprise two lateral frameworks formed by sequentially connecting a plurality of movable crosses through end part hinges; a plurality of cross rods in parallel are arranged between the two lateral frameworks; two ends of each cross rod are respectively and fixedly connected with the movable crosses end part hinges on corresponding positions of the lateral frameworks; a bridge deck slab is arranged on every two adjacent cross rods on the lower parts of the lateral frameworks; a longitudinal stay bar is arranged between every two adjacent cross rods on the upper parts of the lateral frameworks; bridge end posts are respectively arranged on two ends of each lateral frameworks; a telescopic device capable of stretching out from the lower end is arranged in each bridge end post; a guide wheel is arranged on the lower end of each telescopic device. The telescopic emergency bridge provided by the utility model is strong in pertinence, lighter in dead weight, low in operation site requirement, quick in erection and dismount operation speed, and high in automation degree.