An optical system for space rendezvous and docking simulator sensor is designed. The depth of field is increased by using the hyperfocal theory. The problem that the image centroid of signal light in CCD image plane changes with changing object distance is solved by adopting telecentric image space optical design. The lateral aberrations that affect the image centroid seriously is corrected by applying the ameliorative cooke optical configuration. The system has an optical length of 36 mm with 6 pieces of lenses, all of which are spherical surface with no special glass employed. For the 800~880 nm working wavelength and object length of 0.5~130 m, the design quantity of optical absolute distortion is less than ±1 μm with detected precision of field of view approximate to 10″. The designed system meets the requirement of high precision, low cost for manufacture and fine structure. It can be applied in the field of high precision aerocrafts space rendezvous and docking.