Automatic air pressure detection device

An automatic air pressure detection device comprises a base, a fixing frame, a detection block and an air path selection block, the detection block comprises a block body, the block body is fixedly arranged on the base through the fixing frame, a vertical detection hole is formed in the block body, the detection hole is a round hole, and the upper portion of the detection hole is connected with an air pressure detection element. The gas path selection block is composed of a selection matching rod part and a movable matching rod part from top to bottom, the selection matching rod part can penetrate into the detection hole in a sliding and sealing mode from the bottom of the detection hole, and the movable matching rod part can enable the gas path selection block to slide up and down along the detection hole under the action of a movable driving device; a plurality of gas path holes which are not communicated with one another are formed in the same horizontal plane of the detection block, the detection hole is