Timing calibration method of internal clock source of chip and related device

The invention discloses a timing calibration method for a clock source in a chip and a related device, and the method comprises the steps: obtaining the temperature compensation corresponding to the real-time temperature of a first oscillator, so as to improve the calibration precision of the first oscillator; obtaining square wave signals of a preset number of second oscillators, and calculating the theoretical operation duration of the second oscillator corresponding to each square wave signal; calculating the number of square waves generated by the first oscillator corresponding to the square wave signal of the second oscillator according to the square wave signal of the second oscillator, and calculating the actual operation duration of the first oscillator according to the number of square waves and temperature compensation; calculating the actual time base of the first oscillator according to the time base of the second oscillator, the theoretical time length and the actual operation time length of the