The invention discloses an electric field induction type non-contact electroscope and a self-checking method thereof, and belongs to the technical field of power equipment. The electric field induction type non-contact electroscope comprises a sleeve ball shell type electric field sensor, a signal processing circuit board, a signal indicating part and a power supply. According to the electroscope,the electric field sensing principle is used for detecting external power equipment and the live condition of a line, and the electric field sensor in the invention adopts the sleeve ball shell structure, so that an operator can complete the self-checking process by tapping or knocking the top of the electroscope. According to the electroscope, potential safety hazards caused by direct contact with power equipment or a line can be avoided, and personal safety is protected; the small-angle deflection of the electroscope does not affect the accuracy of electricity verification; and the self-checking process is simple and convenient to operate.