The effects of smash-ridging cultivation combined with flood irrigation and salt washing measures on the physicochemical properties of Xinjiang saline-alkalisoil，cotton growthindexes，yield were studied and the rational tillagemode wasdiscussed.Before planting，the soil was treated with twomethods:interval smash -ridging and continuous smash-ridging，and the conventionaltillage(plowing+rotary)was set ascontrol.The soil bulkdensity，watercontent，total saltindex before sowing and at the seedling stage and harvest time weredetermined，cotton plant growth and yield wereanalyzed.The results showed that compared with conventionaltillage，the two smash -ridging tillage reduced the bulk density of the soiltillage layer in different periods and increased the soil watercontent. The interval smash-ridging and continuous smash-ridgingreduced the soil salinity at 0～ 40 cmsignificantly( P<0.05)，especially in the 0～ 20 cm soillayer，which reduced thesalt content of the cultivated layer by 37% and37.5%，respectively，and significantly increased the growth potential andyield ofcotton.Compared with conventional tillage treatment，the yield increased by 46.2% and49.5%，respectively. There was no significant difference in the soil physical and chemical indicators and the cotton growth and yield between the interval smash-ridging and continuous smash-ridgingcultivation，indicating that the effect of the smash -ridging cultivation on the soil structure is long-lasting.Based on the comprehensive research on the soil and environment in thisarea，smash -ridging tillage+rotary tillage+smash-ridging tillage mode can be used to improve soil structuie，reduce soil salinity in thetillagelayer，save costs and increase economic benefits.