 Kashgar area lies in the southwest of Xinjiang province in China, with a climate of less annual rainfall, long hours of sunshine, high temperature and dry air. The population of Kashgar area is about 4 million and the Uighur residents account for about 90.Pediatirc urolithiasis is a very common disease in Kashgar area. From August 2014 to July 2016, there were 708 pediatric patients with urolithiasis were treated in the department of urology in the First Peoples Hospital of Kashgar area which is a central hospital. The stone analysis of these pediatric patients by infrared spectroscopy indicated that ammonium acid urate accounted for 66, magnesium ammonium phosphate accounted for 2.5, uric acid accounted for 11, and calcium stone accounted for 19 these data has not been published .This was very different from previous studies. 