The present invention belongs to the technical field of sighting telescopes, and specifically relates to a pitching angle fitting method for an integrated precision photoelectric sighting system. The present invention puts forward a precision photoelectric sighting system which is simple in shooting calibration and quick and accurate in sighting, adapts to any environmental factor and can furthest reduce the use of sensors and realize double-eye sighting, and provides a pitching angle fitting method for an integrated precision photoelectric sighting system. The system comprises a view field acquisition unit, a display unit, a ranging unit and a sighting circuit unit; the sighting circuit unit is provided with a memory card, the memory card stores the pitching angle fitting method, and precision shooting in any environment is realized using the integrated precision photoelectric sighting system.