The effects of different organic materials on soil physical and chemical properties and crop yield under the intelligent drip irrigation and fertilizer integration were analyzed as comparing with flood irrigation，in order to provide theoretical and technical support for the application and promotion of new intelligent drip irrigation technology，as well as the improvement of saline-alkali soil and crop yield in the Yellow River diversion irrigation district of Inner Mongolia.A field experiment was carried out in a typical saline-alkali land in Dalate Banner，Inner Mongolia in May 2023.Four fertilization treatments were set up under flood irrigation and drip irrigation，including chemical fertilizer(F)，chemical fertilizer with straw(FS)，chemical fertilizer with cow manure(FM)，and chemical fertilizer with high-carbon base fertilizer(FH).Soil samples of 0-20 and 20-40 cm soil layers were collected in September 2023.The soil properties such as soil bulk density，water content，pH，electrical conductivity(EC)，particulate organic carbon(POC)，nitrate nitrogen，available phosphorus(AP)and available potassium(AK)were analyzed，and the relationship between sunflower yield and soil physical and chemical properties was explored.The results showed that compared with flood irrigation，drip irrigation significantly reduced soil bulk density and EC，increased the content of soil water，POC，AP，AK and nitrate nitrogen，and improved sunflower yield.Under intelligent drip irrigation，the bulk density of FS was 4.1% lower than that of F treatment in the 0-20 cm soil layer.Furthermore，FS，FM and FH reduced the EC by 23.0%-48.7% and pH by 2.3%-4.4%，but increased the nitrate nitrogen content by 36.4%-114.2%.FM and FH increased AP by 35.0%-43.3%，AK by 11.7%-14.5% and POC content by 23.1%-26.1%.In the 20-40 cm soil layer，FS，FM and FH increased the contents of nitrate nitrogen by 100.9%-231.5%，AP by 5.8%-21.8%，AK by 11.9%-19.2% and POC by 26.7%-29.1%.The crop yield under FM and FH was enhanced by 20.4%-21.5%.Correlation analysis showed that crop yield was negatively correlated with soil bulk density and EC，and positively correlated with soil water content，AP，AK，nitrate nitrogen and POC.In this study，the use of intelligent drip irrigation water and fertilizer integration combined with cow manure and high carbon base fertilizer could reduce soil bulk density，soil EC and pH，increase soil water content，available phosphorus，available potassium and nitrate nitrogen content，increase soil active carbon component，and then increase sunflower yield compared with conventional flood irrigation.