The invention discloses a ring-shaped oscillation circuit, a ring-shaped oscillator and a realization method thereof, relating to the technical field of telecommunications. A technical problem that the required precision of a ring-shaped oscillation circuit device is high in the prior art is solved. The circuit comprises a current bias generating circuit and a ring-shaped oscillator level circuit. The ring-shaped oscillator level circuit comprises at least one level of first type of inverter and at least one level of second type of inverter. The current bias generating circuit is coupled with the first type of inverter. The output end of the first type of inverter is connected with the input end of the second type of inverter. The output end of the second type of inverter is connected with the input end of the first type of inverter.