［］: The reservoir of Cambrian Longwangmiao formation in Ziyang area of Western Sichuan is mainly reef beach facies reservoir controlled by sedimentation. The deposition thickness of the restricted platform beach in the study area is thin, and erosion pinch out occurs in the northwest of the work area. Reservoir prediction, description of karst trap boundary and identification of favorable zones are not clear. In order to clarify the characteristics of deep-sea carbonate reservoir of Longwangmiao formation in this area, on the basis of single well analysis, combined with regional structure and sedimentary characteristics, karst trap identification was carried out from multiple angles, karst trap morphology was analyzed, trap spatial distribution was described, and reservoir boundary was characterized by wave impedance inversion technology, thus a set of karst traps for Longwangmiao formation in Ziyang exploration area was summarized Methods of identification and reservoir prediction. This method can be used to optimize the favorable karst traps in this area.