In order to explore the effects of straw deep burying and aluminum sulfate modification combination on water and salt transport in soda saline-alkalisoil，a field experiment wasconducted in KezuozhongQi，TongliaoCity，with beet as theindicator crop and the conventionaltreatment(CK)as the control. Four levels of aluminum sulfate supplementallevels(30，60，90，120 g/m 2)were set up respectively under the condition of strawdeepburial(A)or nostraw(B)，to reveal the relationship between aluminum sulfatedosage，straw deep burial and soil moisture content andsalinity，and propose the appropriate aluminum sulfate dosage under mulched film drip irrigation and straw deep burial. The results showed that the average moisture content of 0-50 cm soil of B3 treatment wasthehighest(23.8%)，which was8.2% higher than that ofCK， and the average salt content of B3 treatment wasthelowest(1.69g/kg)，which was 12.6% lower than that of CK. In addition tostraw，the average moisture content of 0-50 cm soil in A3 treatment wasthehighest(26.6%)，which was 2.8% higherthan that in B3treatment，and the average salt content wasthelowest(1.57g/kg)，which was 19% lower than that in B3treatment，and the average salt content wasthelowest，which was 7.6% lower than that in B3 treatment. The soil moisture content at 10-20 and 20-30 cm of A3 treatment wassignificantly higher than that in B3 treatment( P<0.05)，and the soil salt content at 0-10 and 20-30 cm wassignificantly lower than that in B3 treatment( P<0.05).In the A3treatment，the desalting trend of 0-30 cm soil layer wassignificant(P<0.05)，and the average desalting rate was 11.5%. The double effects of aluminum sulfate and straw werepositively correlated with soil moisturecontent(0.808)，and negatively correlated with soilsalt content( -0.564). The combined effects of straw and aluminum sulfate conditioner could effectively reduce soil pH value by 0.53-0.94 and alleviate soil alkalinity by 20.5%-21.9%. 72-104 g/m2 of aluminum sulfate under mulching drip irrigation and straw buried deep was the recommended dosage suitable for the local area. The results could provide theoretical basis for saline-alkali soil improvement in the West Liaohe Plain.