The invention relates to the field of flood prevention and rescue of the Yellow River, in particular to a method for building a depth-limited temporary bridge for emergency rescue. According to the method, a temporary bridge for emergency rescue is built by the aid of a portable bridge cage emergency rescue device, when legs of the temporary bridge are installed, bridge leg depth limiting devicesare directly clamped at reserved positions of the bridge legs, and then the temporary bridge is used for carrying out throwing operation. According to the method, the devices building the temporary bridge can be quickly assembled on site, a cage-based-leg temporary bridge is built at the position of a breach, the bridge leg depth limiting devices are utilized to solve the problems that load bearing capacity of the rapidly-built temporary bridge is low and the bridge is prone to inclination and stability loss, effective repair can be carried out timely when a dam is burst, the temporary bridgetransportation is convenient and fast, the construction steps are simple, and the application range is wide.