This paper reports the result of preliminary research on the breakdown voltage and the dielectric loss factor of crude palm oil (CPO). It was found that the CPO breakdown voltage is about one and a half times higher than the breakdown voltage of Shell Diala B insulation oil. The CPO breakdown voltage is very sensitive to temperature. The lower the temperature of CPO, the lower its breakdown voltage and dielectric loss factor. The CPO dielectric loss factor is higher than the dielectric loss factor of Shell Diala B, and the difference between them is in the range of 0.1%.