Solonchak is widely distributed in Hexi Corridor. In order to rationally exploit the resources, geographic distribution, soil forming conditions, major sub-groups, and composition and toxicity of salts were discussed. An experiment of planting Rumex K-1 was carried out on meadow solonchak with results showing significant effects on desalting and ameliorating the soil. After growing 3~4 years, yield of the fresh grass reached 9.623×10⁴~9.965×10⁴ kg/hm²; 61.78%~80.71% of the salts in the soil were removed; pH value decreased from 8.50 to 8.10; total porosity in the soil layer of 0~20 cm increased 1.89%~7.93%; soil bulk density fell 0.14~0.21 g/cm³; water-stable granular structure rose 23.14%~32.34%; nature soil moisture content went up 72.10~89.10 g/kg; and soil organic matter, readily available N, readily available P and readily available K increased too.