The invention relates to a flapping-wing bionic aircraft, more specifically to a double swing-rod flapping-wing mechanism working in differential seat angle. The swing-rod flapping-wing mechanism contains one or more than one airfoil motion mechanisms and a main framework for installing the airfoil motion mechanisms. Each airfoil motion mechanism is composed of a main rotating shaft lever, an auxiliary rotating shaft lever, an L-shaped wing lever and a chute lever. The main rotating shaft lever of each airfoil motion mechanism is directly connected with the L-shaped wing lever. The auxiliary rotating shaft lever is directly connected with the chute lever. The L-shaped wing lever is connected with the chute lever through a chute. The airfoil is connected with one overhanging end of the L-shaped wing lever. The main framework is composed of an upper installing plate, a lower installing plate and a shoe plate used for fixing the position of the installing plates. Depending on the differential seat angle of the rotating shaft levers, the airfoil motion mechanism can be applied to simultaneously adjust swing motion and attack angle motion of the airfoil of the flapping-wing bionic aircraft. The double swing-rod flapping-wing mechanism has a concise and reasonable structure, is easy to realize and suitable for micromation, and can be widely applied in the development of various flapping-wing bionic micro air vehicles and in the laboratory flapping-wing flight research platform.