Abstract: In view of Xinjiang manual planter licorice output low, sludge fertilizer use efficiency not high production condition, take the sludge fertilizer coupling as the center, through two return general revolving combination design proposal, establishes the return model and carries on the effect analysis,The results show that the relationship between licorice root yield and the irrigation amount , Apply fertilizer amount is Parabola,For Coupling Effects of Water and fertilizer have the effect of increasing cotton yield,The sludge fertilizer coupling effect is obvious, has the obvious production increase effect, is irrigating the quantity is: 255.56mm, the quantity fertilizer are: When 900.00kg/hm2, the licorice output achieves 13226.48kg/hm2, but when water and fertilizer supplies is excessive, the licorice root yield will decrease. When irrigates the quantity to surpass 273.3mm or applies fertilizer surpasses 900.00kg/hm2, Gansu produces the output to assume the drop tendency.