Using 10 types of natural minerals as amendment agents of soil, we experiment of improving soil by irrigating mineralize degrees 4.05.0 g/L brackish water to farmland . The results show that the first amendment agent can reducesoil unit weight 12.23%, increase soil porosity 12.28%. Amendment agents take part in a experiment can reduce soil salt content at most to 72.5% in soil depth of 05 cm and reduce soil anion CO_3~(2-) and HCO_3~- at most to 100%. The fourth amendment agent has affects of increasing Ca~(2 ),Mg~(2 ) and reducing K~ Na~ in soil depth of 040cm. Natura minerals amendment agents of soil have taken a turn for better physical and chemistry environment of soil.