The invention belongs to the radar technology field and discloses a track starting method based on bidirectional Doppler estimation. The method comprises steps that ith measurement at the l time is selected as a track head Zl,i, initialization of a counting value MT=1 from one same target measurement quantity is carried out, initialization of the next association time n=1 of the Zl,i is carried out, for the Zl,i, maximum velocity wave gate screening for measurement at the l+n time is carried out, a residual measurement set is Z'l+n, for measurement at the l+n time satisfying maximum velocity wave gate screening, bidirectional Doppler estimation screening is carried out, and whether the Z'l+n has points satisfying bidirectional Doppler screening is checked. The method is advantaged in that false measurement vectors are effectively eliminated, false track formation is inhibited, under the same false track probability condition, target detection probability is improved, and the detection distance is expanded.