Abstract: In order to obtain an accurate irrigation quota suitable for drip-irrigated spring maize in the northern Xinjiang, six levels of irrigation quotas of W₁（225 m~3/hm~2）, W₂（300 m~3/hm~2）, W₃（375 m~3/hm~2）, W₄（450 m~3/hm~2）, W₅（525 m~3/hm~2） and W₆（600 m~3/hm~2） were set to study the effect of irrigation quotas on growth and yield of spring maize. Some growth, yield and water-saving indices were selected as evaluation indices to analyze the law of water consumption and significance of different indices, then the entropy weight-TOPSIS comprehensive evaluation method was used to optimize the irrigation quota suitable for drip-irrigated spring maize in the northern Xinjiang. The results show that the key fertility period for drip-irrigated spring maize is the tasseling pollen period, and the optimal irrigation quota for this period is 525 m~3/hm~2; the growth rate of water consumption and intensity of water consumption decreases significantly after the irrigation quota reaches 525 m~3/hm~2. According to the significance analysis of each index, the irrigation quota of 450-525 m~3/hm~2 is more suitable for the growth of spring maize in the northern Xinjiang. The results of the comprehensive entropy weighted-TOPSIS evaluation show that the highest closeness and the best evaluation results can be achieved when the irrigation quota is 525 m~3/hm~2, at which time the maize yield is about 16, 178.71 kg/hm~2. Therefore, we recommend 525 m~3/hm~2 as the optimal irrigation quota for drip-irrigated spring maize in the northern Xinjiang.