The Heqing Mn deposit exists in the Indosinian EW fault depression.The metallogenetic time must be earlier than the middle—late Beiya stage of Songgui period, which can be divided into the cogenetic sedimentation type and the leaching filling type.The ore-controlling structure is the special “sag of pot bottom” of synclinal axis.The genesis belongs to the volcanic hydrothermal cogenetic sedimentation and posterior reformation type Mn deposit.