The invention relates to an unmanned aerial vehicle having an identity authentication function, for express delivery. The unmanned aerial vehicle comprises a main body, a landing gear, propellers, first motors and connecting shafts, and further comprises a delivery mechanism and an authentication mechanism, wherein the delivery mechanism comprises a driving assembly, a supporting rod, a spring, two fixed rods, two movable blocks and two clamping assemblies; each of the clamping assemblies comprises a driving unit, a sleeve, a lifting rod, a guide rod and a lifting block; and the authenticationmechanism comprises a rotating assembly, a fourth motor, a supporting frame, a first connecting rod, a second connecting rod and a camera. According to the unmanned aerial vehicle having an identityauthentication function, for express delivery, the clamping mechanism of the unmanned aerial vehicle can be adjusted according to the size of expresses through the delivery mechanism, so that the expresses in different sizes can be fixed by the clamping mechanism, and the practicality of the unmanned aerial vehicle is improved; and through the authentication mechanism, two-dimensional codes sent to a recipient in advance can be authenticated by the unmanned aerial vehicle, so that the identity of the recipient can be confirmed, and the delivery accuracy of the expresses is improved.