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Disclose the polycrystalline diamond cutters and its manufacturing method for rotary drilling-head. Polycrystalline diamond green compact (100) includes the polycrystalline diamond main body with working surface, interface surface and periphery surface. The polycrystalline diamond green compact also includes the substrate being integrated in the polycrystalline diamond main body along the interface surface. The non-diamond volume fraction of the polycrystalline diamond main body is greater than at the working surface at the interface surface.