Abstract: There is a new challenge for getting parameters of ionosphere model with high accuracy under the limited distribution of regional monitoring network.The VTEC of puncture points can be obtained by re-process the data after fixing the hardware delay,then the regional ionosphere model would be estimated.This strategy differs significantly from GPS global ionosphere solution strategy.In this paper the strategy of getting parameters of ionosphere model under the limited distribution of regional monitoring network is discussed in detail,the possible accuracy of this method is analyzed,and the improvement is proposed.