Rotary table ladder stand structure and fire fighting truck

The invention provides a rotary table ladder stand structure and a fire fighting truck, the rotary table ladder stand structure comprises a rotary table body used for connecting an arm support and a frame, the arm support can rotate relative to the frame through the rotary table body, and the rotary table body is provided with a first side surface; the connecting assembly is connected with the first side surface; the crawling ladder is rotationally connected with the connecting assembly, the crawling ladder can rotate relative to the rotary table body through the connecting assembly, the crawling ladder is provided with a first station and a second station, and under the condition that the crawling ladder is located at the first station, the included angle between the crawling ladder and the first side face is a first included angle; under the condition that the crawling ladder is located at the second station, the included angle between the crawling ladder and the first side face is a second included angle,