To solve the problems of complex water breakthrough law and great difficulty in stabilizing oil and controlling water in fractured reservoir of metamorphic rock buried hill in Jinzhou South oilfield, Bohai Bay, this paper summarized four reservoir types and water breakthrough law by comprehensively using core observation, thin section identification, conventional logging, imaging logging and other data combined with production performance from metamorphic rock lithology and reservoir influencing factors. The results show that: gneiss, migmatite, cataclasite and magmatic dikes are developed in Jinzhou South oilfield; the reservoir space is mainly composed of structural fractures, cataclastic intergranular pores and dissolution pores; Class I reservoir is located in the uplift area of paleogeomorphic unit, with network fractures developed, which has slow and stable water breakthrough type; Class II reservoir is located in the paleogeomorphic platform area, with a single fracture developed, which has a fluctuating upward water breakthrough type; Class III reservoir is located in the slope area, with a single fracture developed, which has a rapidly rising water breakthrough type; Class IV reservoir is located in sag area, with undeveloped fractures and has no or low water cut. The application of the research results in Jinzhou South oilfield has achieved obvious effect of stabilizing oil and controlling water, and it can provide reference for other oilfields of the same nature.