The invention provides a method for realizing satellite navigation positioning by adopting different navigation frequency bands and relates to the satellite navigation technology. The existing communication satellite is rent for navigation positioning and no navigation satellite is launched specially. The rent satellite adopts different navigation frequency bands which are close to each other instead of the same navigation frequency band. As the selected navigation frequency bands are close, the same antenna containing all the navigation frequency bands can be used for ground receiving. GPS chips which are low in price, stable and reliable in the market are adopted in a navigation receiver, which lowers the manufacturing cost of a satellite receiver. As the GPS chips are designed directing at the frequency band of GPS, namely the L wave band, frequencies of navigation signals with different frequency bands are converted to the frequency band of the GPS by a frequency conversion unit, time delay caused by all frequency conversion units is measured and compensated by software and finally precise navigation positioning is realized by the GPS chips. By the method, anti-interference capability of a satellite navigation system can be improved greatly.