The invention discloses a capacitance type resonance electricity acquiring circuit used for acquiring low-voltage electric energy from a high-voltage power source. One end of the primary side of a transformer of the capacitance type resonance electricity acquiring circuit is connected with the high-voltage power source. The current input end of a first switch is connected with the other end of the primary side of the transformer. The current input end of a second switch is simultaneously connected with the other end of the primary side of the transformer and the current input end of the first switch. The current input end of an energy storage unit is connected with the current output end of the second switch, the current output end of the energy storage unit is connected with the current output end of the first switch and is grounded, and the energy storage unit is used for storing voltages of the high-voltage power source. The auxiliary side of the transformer supplies power to a magnetic self-saturation controller, the magnetic self-saturation controller comprises two control ends, the first control end of the magnetic self-saturation controller is connected with the control end of the first switch and used for controlling turning on or turning off of the first switch, and the second control end of the magnetic self-saturation controller is connected with the control end of the second switch and used for controlling turning on or turning off of the second switch.