Abstract: A branch shears structure includes a fixed blade, a sleeve secured on a lower portion of the fixed blade, a bar secured in the sleeve, a first pulley mounted on the sleeve, a mobile blade pivotally mounted on a mediate portion of the fixed blade, an elongated linking plate having a lower portion pivotally mounted on an upper portion of the fixed blade, a short linking plate having a first end pivotally mounted on the mobile blade and a second end pivotally mounted on the elongated linking plate, a second pulley mounted on an upper portion of the elongated linking plate, a rope in turn passing through the first pulley and the second pulley and extending outward from the second pulley for pulling the elongated linking plate which moves the short linking plate which moves the mobile blade to pivot relative to the fixed blade, and a tension spring having a first secured to the fixed blade and a second end secured to the elongated linking plate.