The invention discloses an elastic straight pin feeding device used for producing low-voltage circuit breakers, which is characterized in that: a fixed plate is connected under an air cylinder, a slide rod is arranged under the fixed plate, two guide poles are arranged on the fixed plate, two lower guide poles are arranged between the fixed plate and the slide rod, two ejector pins are connected below the fixed plate, a corner plate, a static contact bus bar and an arc sheet are arranged on a locating block which is arranged below the slide rod, both ends of the slide rod are provided with square holes, a feeding block is fixed at the front end of the slide rod, both sides of the feeding block, which correspond to the square holes, are provided with U-shaped grooves, two popping-boxes are clamped in the square holes of the slide rod, a plurality of elastic straight pins are arranged in the popping-boxes, one side of each popping-box is provided with a spring, both ends of each spring are respectively provided with a slide rod provided with a spacer pin in a contacted way, and one end of each popping-box is provided with a notch. The invention adopts the popping-box type structure, realizes semi-automatic feeding operation, enhances the production efficiency, avoids the problem that the elastic straight pins are not loaded enough and are arranged in reverse and prevents the danger caused when human hands contact the elastic straight pins.