Study on the ore compositions and their existence state indicates that the manganese element of the Xinqiao ore deposit exists mainly in dialogite and 30% in calcite and metallic sulphides that contain a great deal of gold. It is argued that existence of a lot of manganese in calcite and metal sulphides is the major cause of low recovery of manganese in the process of ore concentration. The deposit is thought to be of high comprehensive utilization value and important to prospecting metal sulphides-abundant belt.