A stator structure of a vehicle motor includes a stator core assembly and a plurality of coil assemblies composed of flat wires. The stator core assembly includes an annular portion and a plurality of tooth portions. The tooth portions extend from the annular portion in a radial direction toward a center of the stator core assembly. Each coil assembly is configured around a corresponding tooth portion. Each coil assembly includes a first flat wire and a plurality of second flat wires that are electrically connected in parallel. The first flat wire is radially stacked and wound around the corresponding tooth portion. The second flat wires are arranged radially adjacent to the first flat wire and are electrically connected in series to the first flat wire. The second flat wires are alternately stacked and radially wound around the corresponding tooth portion.