Phosphorus was extracted from Lake Dianchi sediment to study its distribution. The highest TP levels were found in the north and south, lower in the middle. Fe-P and Al-P make up 30% of TP, while Ca-P and OP make up 70%. Labile phosphorus is influenced by H+ concentration, which is linked to Fe-P + Al-P levels. Fe-P + Al-P is strongly connected to TP levels.