In order to explore the suitable irrigation amount for maize planting under the condition of integrated drip irrigation and water fertilizer in Ningxia, this study conducted a study on the effects of irrigation amount on spring maize growth, dry matter accumulation, transport and yield in 2019 and 2020. Taking Dika517 as the test variety, using the method of field experiment, three irrigation water levels were set up: CK(100%, 3,300 m³/ha), T₁(70%, 2,310 m³/ha), T₂(85%, 2,805 m³/ha). In 2019, plant height, stem diameter and SPAD values were the highest under T₁, the next is T₂, and the lowest is CK. In 2019 and 2020, the leaf area index (LAI) of spring maize under T₁ was larger, which was beneficial to the maintenance of chlorophyll. In 2019 and 2020, the total dry matter accumulation increased gradually with the advance of the growth period, and the dry matter transport efficiency was the highest under T₂. Among the yield components, grain weight per ear and weight of 100 grains are closely related to yield. Grain length per ear, bald tip length, grain weight per ear and weight of 100 grains in 2020 are all important factors affecting yield. In both two years, the grain yield under T₁ was 5.17%, 32.07% and 3.52%, 26.88% higher than that under T 2 and CK, respectively. For this test area, 70% drip irrigation can be recommended as the reference index of the local drip irrigation water and fertilizer integrated irrigation amount.