The production of ammonium phosphate by “ammoniated slurry concentrating process”（ASCP) developed by Sichuan University etc. has solved the difficulty that China´s low grade phosphorus ore is not suitable for the imported “phosphoric acid concentrating process”(PACP). 87 plants employing ASCP have been built with a total capacity of 2.79×10⁶ t/a, which is 60% of the total ammonium phosphate production in China. Recently, a technique for ammonium phosphate production combining both ASCP and the imported PACP has been developed and put into operation in Wengfu of Guizhou Province. The new process with independent property right has been adopted in the five updating projects of phosphate fertilizer in China.