Frequency compensation method, compensation circuit and display device

The invention discloses a frequency compensation method, a compensation circuit and a display device. The frequency compensation method comprises the following steps: judging whether a frequency value of a system clock signal deviates from a target frequency value or not in each of a plurality of time periods according to a reference clock signal; when the frequency value of the system clock signal in one time period deviates from the target frequency value, the frequency of the system clock signal is adjusted according to the offset, the duration corresponding to each time period is equal to the duration of N clock cycles of the reference clock signal, and N is an integer larger than or equal to 1. When the clock frequency output by the oscillator changes, real-time compensation can be carried out on the clock frequency output by the oscillator, so that the oscillator can still carry out clock output with the expected frequency even if the working voltage and/or the working temperature change, and high-speed