Abstract: To study the soil improvement effect and stalk ion change rule of sorghum in saline soil, two salttolerance sorghum varieties‘Jintianza3’and‘Jinza1401’were planted in saline soil of Qingxu and loam of Yuci. Sodium, potassium, calcium, magnesium and chloride ion in 0-20 cm soil before and after sorghum planting and the change rule of sodium, potassium, calcium, magnesium in harvested sorghum stalk were studied. The results showed that the two varieties had declined stalk yield but stable ion content in saline soil, and they could grow normally in the saline soil in Qingxu. Soil electrical conductivity of 0-20 cm soil and the measured content of the five kinds of ions reduced when the sorghum was planted in saline soil, and the reduction amount in saline soil was significantly higher than that in loam. Therefore, planting sorghum in saline soil could effectively improve the saline-alkali land, and the stalk yield of sweet sorghum could also increase farmers’economic benefit.