The invention discloses a telescopic emergency bridge which comprises a transport operation vehicle, a bridge main body, a hydraulic system, a supporting plate and a control cable system. The bridge main body comprises two lateral frameworks which are formed by sequentially connecting multiple movable crosses through end hinges. A plurality of parallel horizontal rods are arranged between the two lateral frameworks, and the two ends of each horizontal rod are fixedly connected with the end hinges of the movable crosses at corresponding positions of the lateral frameworks. A bridge deck slab is arranged on every two adjacent horizontal rods on the lower portion of each lateral framework, a longitudinal supporting rod is arranged on every two adjacent horizontal rods on the upper portion of each lateral framework, the two ends of each lateral framework are respectively provided with a bridge end post, a telescopic device is arranged in each bridge end post and extends out of the lower end of bridge end post, and guide wheels are arranged at the lower ends of the telescopic devices. The telescopic emergency bridge is high in pertinence, low in weight, low in requirement for operation sites, high in erecting and detaching operation speed, and high in automation degree.