A sealing connector comprising: a first tubular member comprising a first connecting end and a first flange located at the first connecting end, the first flange comprises a first surface and a second surface spaced from the first surface in the axial direction; a second tubular member comprising a second connecting end and a second flange located at the second connecting end, the second flange comprises a third surface and a fourth surface spaced from the third surface in the axial direction, the second connecting end being configured to be connected with the first connecting end thereby fluid communicating the first tubular member with the second tubular member; a first locking member; a first sealing member configured to be located between the first locking member and the first flange, a sleeve comprising an inner surface; a second sealing member; a second locking member; and an anti-rotation pad; wherein in an assembled state, the first locking member and the first flange is capable of applying a force on the first sealing member in an axial direction, the first connecting end and the second connecting end are received in the sleeve, the first surface faces the third surface, the first locking member presses the first sealing member against the second surface and lets the first sealing member be in contact with the inner surface, the second locking member presses the second sealing member against the fourth surface and lets the second sealing member be in contact with the inner surface, the first locking member and the second locking member are both fixed to the sleeve, the second connecting end and the first connecting end are spaced by the anti-rotation pad, the anti-rotation pad is configured to prevent the first tubular member and the second tubular member from rotating relative to each other about the axial direction; characterized in that the anti-rotation pad comprises two opposite surfaces in the axial direction, the surface facing the first surface has a first limiting protrusion, and the first surface correspondingly defines a first limiting groove, the first limiting protrusion is capable of being engaged with the first limiting groove in the assembled state; the surface facing the third surface has a second limiting protrusion, and the third surface correspondingly defines a second limiting groove, the second limiting protrusion is capable of being engaged with the second limiting groove in the assembled state. a first tubular member comprising a first connecting end and a first flange located at the first connecting end, the first flange comprises a first surface and a second surface spaced from the first surface in the axial direction; a second tubular member comprising a second connecting end and a second flange located at the second connecting end, the second flange comprises a third surface and a fourth surface spaced from the third surface in the axial direction, the second connecting end being configured to be connected with the first connecting end thereby fluid communicating the first tubular member with the second tubular member; a first locking member; a first sealing member configured to be located between the first locking member and the first flange, a sleeve comprising an inner surface; a second sealing member; a second locking member; and an anti-rotation pad; wherein in an assembled state, the first locking member and the first flange is capable of applying a force on the first sealing member in an axial direction, the first connecting end and the second connecting end are received in the sleeve, the first surface faces the third surface, the first locking member presses the first sealing member against the second surface and lets the first sealing member be in contact with the inner surface, the second locking member presses the second sealing member against the fourth surface and lets the second sealing member be in contact with the inner surface, the first locking member and the second locking member are both fixed to the sleeve, the second connecting end and the first connecting end are spaced by the anti-rotation pad, the anti-rotation pad is configured to prevent the first tubular member and the second tubular member from rotating relative to each other about the axial direction; characterized in that the anti-rotation pad comprises two opposite surfaces in the axial direction, the surface facing the first surface has a first limiting protrusion, and the first surface correspondingly defines a first limiting groove, the first limiting protrusion is capable of being engaged with the first limiting groove in the assembled state; the surface facing the third surface has a second limiting protrusion, and the third surface correspondingly defines a second limiting groove, the second limiting protrusion is capable of being engaged with the second limiting groove in the assembled state.