The invention relates to an unmanned aerial vehicle with the good balance property. The unmanned aerial vehicle comprises a main body and four propellers and further comprises an adjusting mechanism and four rain-shielding mechanisms. The adjusting mechanism comprises an adjusting assembly, a first motor, a first transmission belt and two horizontal moving assemblies. Each horizontal moving assembly comprises a lead screw, a transmission wheel and a moving block. The adjusting assembly comprises a connecting block, two second motors, two driving wheels, two second transmission belts and two positioning rods. Each rain-shielding mechanism comprises a telescopic assembly and a rain-shielding plate. Each telescopic assembly comprises a cross rod, a driving unit, a telescopic frame, a connecting plate, two sliding blocks, two connecting rods, two transmission blocks and two limiting units. According to the unmanned aerial vehicle with the good balance property, the positions of express parcels are adjusted through the adjusting mechanism, the gravity center of the whole unmanned aerial vehicle is adjusted conveniently, thus the balance property of the unmanned aerial vehicle is higher;and express objects can be shielded through the rain-shielding mechanisms, the probability that the express objects are affected by rainwater is decreased, and thus the practicability of the unmannedaerial vehicle is higher.