The invention discloses a reference voltage generation circuit, a reference voltage generation method and a control chip, relates to the technical field of display and is used for generating reference voltage matched with different synchronous-frame frequencies according to the same. The reference voltage generation circuit comprises a difference calculation unit, a searching unit and a reference voltage calculation unit, the difference calculation unit is used for acquiring synchronous-frame frequency of fixed-frame frequency and continuous frame from a time sequence controller and calculating a frame frequency difference between synchronous-frame frequency and fixed-frame frequency of a current frame, a one-to-one corresponding relation between multiple frame frequency differences and multiple reference differences is stored in the searching unit, the searching unit is used for searching a reference voltage difference corresponding to the frame frequency difference acquired by calculation, and the reference voltage calculation unit is used for adding fixed reference voltage matched with the fixed frame frequency with the reference voltage difference acquired by searching to acquire reference voltage matched with the synchronous-frame frequency of the current frame. The reference voltage generation circuit is used for generating reference voltage needed by a displayer for display.