Abstract The Beidou ionosphere model includes the Beidou system modified Klobuchar model (BDSKlob), the Beidou global broadcast ionospheric delay correction model (BDGIM) and a wide area differential grid ionosphere model. We analyze in detail the delay jump caused by updating parameters of two ionospheric models. Based on code grid ionosphere data, we compare the changes of two ionosphere models with space and time. We analyze the correction and positioning accuracy of different ionosphere models at different latitudes in different periods. We evaluate the service scope and service accuracy of ionosphere information of Beidou grid network in 2018. The results show that, compared with the BDSKlob ionospheric model, BDGIM and CODE GIM are similar in accuracy and distribution; the delay jump of parameter updating of two adjacent models is less than 1 ns. The accuracy of BDGIM model in the northern hemisphere is better than that in the southern hemisphere. The correction rate of BDGIM in China is more than 75%, and the global correction rate is 60%, which is better than the BDSKlob ionospheric model. The positioning accuracy of BDGIM can be improved by up to 45% compared with the BDSKlob model. The effective ionosphere area of Beidou grid basically covers China, the ionosphere delay error is better than 2.08 TECu, and the correction ratio is better than 80%.