A damper with damping adjustment, comprising a shaft sleeve, and a shaft core configured to be hermetically and rotatably connected to the shaft sleeve, a chamber wall of an inner chamber of the shaft sleeve is disposed with two oil separating ribs configured to limit rotation ranges of two wing plates, the two wing plates of the shaft core are respectively disposed with a one-way oil blade configured to be slidably connected to the chamber wall of the inner chamber of the shaft sleeve, two ends of the inner chamber of the shaft sleeve respectively comprise a shaft core socket configured to receive the shaft core and a nut socket configured to receive an adjusting nut, and the nut socket is screwed to the adjusting nut, wherein: an end surface of the adjusting nut comprises a support shaft groove, an end of the shaft core comprises a support shaft configured to be hermetically and rotatably disposed in the support shaft groove of the adjusting nut, an adjustable clearance is defined between the end surface of the adjusting nut and the end of the shaft core the adjusting nut and the nut socket comprise upper sections (3-23, 1-1), middle sections (3-22, 1-2) and lower sections (3-21, 1-3), diameters of the lower sections (3-21, 1-3) are larger than diameters of the middle sections (3-22, 1-2), diameters of the middle section (3-22, 1-2) are larger than diameters of the upper sections (3-23, 1-1), an upper end surface of the upper section of the adjusting nut comprises the support shaft groove, the middle section of the adjusting nut comprises an annular groove, an adjusting nut sealing ring surrounds the annular groove to enable the adjusting nut to be hermetically connected to the nut socket of a bottom portion of the shaft sleeve, and an outer peripheral surface of the lower section of the adjusting nut comprises an external thread. a shaft sleeve, and a shaft core configured to be hermetically and rotatably connected to the shaft sleeve, a chamber wall of an inner chamber of the shaft sleeve is disposed with two oil separating ribs configured to limit rotation ranges of two wing plates, the two wing plates of the shaft core are respectively disposed with a one-way oil blade configured to be slidably connected to the chamber wall of the inner chamber of the shaft sleeve, two ends of the inner chamber of the shaft sleeve respectively comprise a shaft core socket configured to receive the shaft core and a nut socket configured to receive an adjusting nut, and the nut socket is screwed to the adjusting nut, wherein: an end surface of the adjusting nut comprises a support shaft groove, an end of the shaft core comprises a support shaft configured to be hermetically and rotatably disposed in the support shaft groove of the adjusting nut, an adjustable clearance is defined between the end surface of the adjusting nut and the end of the shaft core the adjusting nut and the nut socket comprise upper sections (3-23, 1-1), middle sections (3-22, 1-2) and lower sections (3-21, 1-3), diameters of the lower sections (3-21, 1-3) are larger than diameters of the middle sections (3-22, 1-2), diameters of the middle section (3-22, 1-2) are larger than diameters of the upper sections (3-23, 1-1), an upper end surface of the upper section of the adjusting nut comprises the support shaft groove, the middle section of the adjusting nut comprises an annular groove, an adjusting nut sealing ring surrounds the annular groove to enable the adjusting nut to be hermetically connected to the nut socket of a bottom portion of the shaft sleeve, and an outer peripheral surface of the lower section of the adjusting nut comprises an external thread. an end surface of the adjusting nut comprises a support shaft groove, an end of the shaft core comprises a support shaft configured to be hermetically and rotatably disposed in the support shaft groove of the adjusting nut, an adjustable clearance is defined between the end surface of the adjusting nut and the end of the shaft core the adjusting nut and the nut socket comprise upper sections (3-23, 1-1), middle sections (3-22, 1-2) and lower sections (3-21, 1-3), diameters of the lower sections (3-21, 1-3) are larger than diameters of the middle sections (3-22, 1-2), diameters of the middle section (3-22, 1-2) are larger than diameters of the upper sections (3-23, 1-1), an upper end surface of the upper section of the adjusting nut comprises the support shaft groove, the middle section of the adjusting nut comprises an annular groove, an adjusting nut sealing ring surrounds the annular groove to enable the adjusting nut to be hermetically connected to the nut socket of a bottom portion of the shaft sleeve, and an outer peripheral surface of the lower section of the adjusting nut comprises an external thread.