The invention relates to a non-contact type electric energy transmission system used for a rotary guiding well-drilling tool. The non-contact type electric energy transmission system comprises a high frequency inverter, a rotary transformer and a power supply converter. The primary electrode of the rotary transformer is installed on a central drilling rod, and the secondary electrode is installed on a non-rotary external sleeve. The high frequency inverter is fixed on the position, which is arranged between a slurry generator and the rotary transformer, of the central drilling rod. The power supply converter is installed on an electronic control unit. A low frequency three-phase AC signal outputted by the slurry generator is converted into a high frequency single-phase AC signal through the high frequency inverter, and the high frequency single-phase AC signal is outputted to the primary electrode of the rotary transformer. Energy is transmitted between the primary electrode and the secondary electrode of the rotary transformer via an induction electromagnetic coupling. Then energy is outputted to the power supply converter via the secondary electrode of the rotary transformer. Non-contact type coupling transmission of electric energy of the rotary guiding well-drilling tool from a rotor to a stator is realized by the non-contact type electric energy transmission system, and a high-power power supply requirement of underground near-drill while-drilling instrument and equipment is met.