We demonstrate frequency stabilization of DFB laser via modulation transfer spectroscopy,which avoids the interference of Doppler absorption spectrum.By modulating the frequency of laser beam(pump laser beam),the other laser beam(probe laser beam)overlap pump laser beam is modulated as the same frequency by nonlinear interaction.By demodulating the signal from detection beam,an error signal is generated through the low pass filter.The frequency is stabilized at the 0 point position of the MTS frequency discrimination curve by PID loop which shows frequency fluctuation is less than 149 kHz,and the relative frequency stability is improved by nearly two orders of magnitude.