Umbrella bow piece stacking device convenient to adjust

The invention belongs to the technical field of umbrella arch piece processing, and discloses an umbrella arch piece stacking device convenient to adjust. Comprising a stacking conveying table and a first conveying belt, a mechanical arm is fixedly connected to the top end of the stacking conveying table, multiple sets of bow slice bodies are evenly distributed on the outer side of the first conveying belt, an air cylinder is fixedly connected to the outer side of the stacking conveying table, and the output end of the air cylinder is fixedly connected with a stacking box; and external threads in different directions are formed in the two ends of the three sets of positive and negative thread lead screws correspondingly, one ends of the three sets of positive and negative thread lead screws are rotationally connected with the inner wall of the stacking box, and the ends, away from the stacking box, of the three sets of positive and negative thread lead screws penetrate through the stacking box and extend to t