Abstract:This paper expounds some points of satellite positioning network in Talimu basin,which are field date acquisition,data processing,network balancing and the accuracy of combined balancing of satellite positioning geocentric coordinate system. No. 8 coordinate system and new No. 54 coordinate system. It is shown that astrogecdetic network has a systeriatic deviation from the satellite positioning network,the scale ratio factor variation increasing northwestwards. The authors came to the conclusion: in satellite positioning in Talimu basin,geocentric coordinate system should be transformed using 7 parameter model;and the positioning accuracy may be 1-2m if the tie ranking is within 500 km and if the satellite flies over the positioning site for 25 times at least.