Abstract: Fourteen tartary buckwheat were used in this study to conduct a analysis on some characters relevant to grain yields.Among the eleven characters observed,the sequense of their role on grain yields was as follows：plant heightnodal numbers of main stemdays of seedlingplant grain weightplant grain numbersdays of squaring to floweringdays of growingthousand kernel weightdays of seedling to squaringnumbers of first branchy stem.Between grain yields and days of flowering to ripening was small relations.Grain yields can be increased by four important ways,increasing plant height,nodal numbers of main stem,plant grain weight and plant grain number.Selecting big grain and days of squaring to flowering was effective ways to impove grain yields.To increase days of sleeding to squaring and numbers of first brancy stem could improve grain yields.To increase emergence days could lead to reduction of grain yields.