Abstract: In order to study the effect of absorbent polymer on the growth and yield of autumn planting soybean in the hilly dry land in Minnan, under the condition of field experiment, taking treatment without absorbent polymer as control, the author studied the effect of different content absorbent polymer on the growth and production under furrow application. The results showed that the growing periods were prolonged by 2-7 d, the yield per unit, the effective pod rate, seed weight per plant and 100-seed weight were increased compared with the control. The effect was more significant with increasing application of absorbent amount. The absorbent application at a rate of 60 kg/hm² was recommended for the ploughed furrow, the increase on the net income was 1503.00 yuan/hm² with a cost/return ratio at 1:2.67. The application rate was suitable for autumn planting soybean on dry land soil in southern Fujian and other regions.