The Middle Devonian sedimentary environment of the West Qining Moun-tains can be divided into the abyssal-bathyal basin facies district, carbonate plat-form facies district and shallow-sea shelf faces district. These facies districts canbe further divided into some facies, sub-facies and micro-facies. The down-faultedstagnant basin facies and carbonate platform facies have close relationship withlead and zinc deposits. The formation of lead and zinc ore depesits is closely related to the sedimen-tary environment: thermal water sedimentary lead and zinc deposits were formedin the down-faulted stagnant basin environment and controlled by growth faults,thermal water sedimentation and faulted stagnant basin; reformed thermal watersedimentary lead and zinc deposits were formed in reef sub-faces on margins ofthe carbonate platform and controlled by the carbonate platform, organic reefs andthermal water sedimentation-reformation.