The invention discloses an iron-core-free disc type motor for an unmanned aerial vehicle. The iron-core-free disc type motor for the unmanned aerial vehicle comprises a machine seat disc, a stator armature disc, an end cover disc and a plurality of permanent magnets, wherein the machine seat disc is connected with a fixing assembly of the unmanned aerial vehicle; the stator armature disc is coaxially fixed on the machine seat disc; the outer side of the end cover disc is fixedly connected with an assembly to be driven of the unmanned aerial vehicle; the permanent magnets are arranged in a wayof being right aligned with the stator armature disc; the permanent magnets are pasted on the inner side of the end cover disc at uniform intervals in the circumferential direction of the end cover disc; poles N and poles S of the permanent magnets are sequentially in alternate and uniform distribution; the permanent magnets are permanent magnets with nonuniform thickness; and the permanent magnets are magnetized in the axial direction of the end cover disc. The iron-core-free disc type motor for the unmanned aerial vehicle has the beneficial effects that the permanent magnets with nonuniformthickness are used; the harmonic wave phenomenon of the iron-core-free disc type motor is greatly reduced; further, the noise generated during the driving is reduced; and the operation of the motor ismore reliable.