An ellipsoidal mono-capillary is designed and fabricated, and its performance is measured by both optical measurement and X-ray testing. The profile errors of the ellipsoidal mono-capillary is 15 μrad. The diameter of focusing spot is 40 μm and the launching angle of focusing spot is 1.75 mrad at energy of 9 keV. Based the developed ellipsoidal mono-capillary, a X-ray nano-imaging system is designed and constructed at the X-ray imaging beamline (BL13W1) in Shanghai synchrotron radiation facility (SSRF). The X-ray nano-imaging is achieved with utilization of the ellipsoidal mono-capillary, which indicates that the ellipsoidal mono-capillary can meet the requirement of X-ray nano-imaging.