Fracture is one of the important way by which oil and gas migrated. The fluid inclusion can show the feature of the fluid of that time and the fracture. After the petrographical study of the fluid inclusion in the Pingnan Fracture Zone, we find that the Pingnan Fracture occur plusminus reversal movement after it formatted during the second Yanshanian movement. The research of inclusion homogeneous temperature shows that there are two oil and gas migration in the Pingnan fracture zone, the temperature they corresponding to is 60~85℃ and 90~120℃. The oil and gas of the second migration move into the burial hill reservoir which is under the Pingnan fracture.