10°。A finger-chain type sugarcane-lifter was studied. The orthogonal and single experiments were conducted to study the following factors: advancing velocity vm, rotational speed of driven sprocket n, lateral-angle βof slideway and oblique-angle αof slideway. The mathematical models for the two evaluations index which contained lodging angle after lifting and different factors were constructed by using the method of mathematical statistics. And the parameters of the sugarcane-lifter were optimized. The results of experiments showed that these four factors had significant impact on lodging angle after lifting. The optimal parameters were as following: the function between rotational speed of driven sprocket n and advancing velocity vm was n=-1599.618v2m+1609.678vm, the obliqueangle equaled to 60° and the lateral-angle equaled to 10°. 