Oscillation clock capable of automatically adjusting frequency and generated inside chip and designing method thereof

The invention provides a stable oscillation clock generated inside a chip, at least comprising an oscillation clock generator (OSC generator), a programming controller for controlling clocks with different frequencies and a timing counter, wherein a control signal output by the programming controller for controlling the clocks with the different frequencies is directly connected to the oscillation clock generator (OSC generator); an oscillation clock signal is generated by the oscillation clock generator; the oscillation clock signal is output to outside to be used by different parts of the chip; the oscillation clock signal is connected to the clock input end of the timing counter to adjust the counted quantity of the timing counter; and the counted quantity of the timing counter is connected to a comparator to be compared with a standard performance to generate a feedback signal to a logic control unit of the stable oscillation clock, so as to automatically determine the frequency of the oscillation clock. A designing method of the stable oscillation clock generated inside the chip enables the work of the chip to be more stable and reduces the error rate and the like; and the stable oscillation clock is compact in structure and is safe and reliable.