The invention discloses a two-level SVPWM (Space Vector Pulse Width Modulation) overmodulation method which comprises the following steps of: (S101) dividing the track with a given reference voltage vector into three set regions in each 60-DEG sector, namely an overmodulation region I, an overmodulation region II and an overmodulation region III; (S102) calculating the action time of a basic vector through linear modulation; (S103) judging the starting point of overmodulation according to the action time of zero vector in the basic vector; and (S104) judging the region of the given reference voltage vector according to the action time of the basic vector calculated in the step (S102), and directing correcting the action time of the basic vector of each sector according to the region judgment result of the given reference voltage vector. With the method, SVPWM overmodulation calculation becomes simple, easy to realize and reliable to control and also has high accuracy.