The utility model provides a dry transformer capable of converting voltage between 20 kV and 10 kV. The dry transformer comprises a transformer main body; internal diameter cross sections and external diameter cross sections of coils of the transformer main body are in oval structures; meanwhile, each coil is uniformly divided into two units, namely an upper unit and a lower unit; each coil is axially divided into at least eight sections; each unit at least comprises four of the eight sections, and leads respective head and tail and an adaptor to a corresponding pouring piece; and meanwhile, each unit is provided with a pair of adjacent connected adaptors, which are connected in series or in parallel through two unit wire turns of each coil, so that the voltage conversion between 20 kV and 10 kV of the transformer main body is realized. With the adoption of the scheme, the dry transformer provided by the utility model has the advantages of low loss, low noise, energy conversation, environmental friendless and the like, and can reduce a partial discharging amount. Most importantly, the dry transformer provided by the utility model can realize the voltage conversion between 20 kV and 10 kV, thereby avoiding repeat investment of equipment.