Abstract: In order to explicit the long-term effect of sandy soil amendment on water retaining and yield increase of sandy maize, we applied sandy soil amendment in different years to study the long-acting effect of sandy soil amendment on soil water content, water productive efficiency and yield of sandy maize. The results showed that: the sandy soil amendment treatments could improve the water content in 0-40 cm soil layer in each growing period, and the performance of the soil water content in corresponding layer was: the third year (C) ＞ the fourth year (D)＞the second year (B)＞the first year (A)＞CK, increased by 53.95%, 46.68%, 37.83% and 34.92% compared with CK. The third year treatment had the highest yield, which was 9490.5 kg/hm², increased by 11.11%, 18.01% and 38.69% compared with the fourth year, the second year and the first year. Water productive efficiency of the third year treatment was 6.91 kg/(hm²·mm), increased by 11.24%-59.53% compared with other treatments. The study showed that, sandy soil amendment treatments applied after the first three years could significantly improve soil water content, water productive efficiency and yield of sandy maize, and reached to the highest on the third year, which indicated that it had a remarkable water conserving and yield-increasing effect.