In order to meet the high precision detection of an advanced middle and upper atmosphere wind temperature measurementlidarinChina, asetofactivefeedbackfrequencystabilizationsystemwasbuiltbyself-writtensoftwareinthis paper. This system achieved the frequency control of 1 319 nm seed laser with high precision wavelength meter and high performancedigital-to-analog converter. The resultsofthe stability testexperimentshowthatthesystem can lock the laser wavelengthwithin1318.81999±0.00006 nmfor12hours(thefrequencystabilizationaccuracy waslessthan20.7MHz), and the wavelength stability was improved by 5 orders of magnitude, and the monotonic decreasing Allan variance of wavelengthtended to10-6, whichachievedthelong-term accuratelockingofseedlaserwavelength. Theworkinthispaper willprovidetechnicalguaranteeforthehighaccuracydetectionofothersimilarlidars.