The invention provides a Ni-free MnZn ferrite magnetic core with double characteristics and a manufacture method thereof, wherein the double characteristics mean high temperature and high Bs, and wide temperature and low loss. The ferrite magnetic core comprises main components and auxiliary components. The main components comprise: 53 mol%-54 mol% of Fe2O3, 39 mol%-42 mol% of MnO and 4 mol%-7 mol% of ZnO; and the auxiliary components comprise: Co2O3 or CoO or Co3O4 as a first auxiliary component, SiO2 and CaCO3 as a second auxiliary, and a third auxiliary component which is one or more selected from MoO3, TiO2, SnO2, Nb2O5, V2O5, Sm2O3 and ZrO2. The provided MnZn ferrite magnetic core with double characteristics has unit volume loss Pcv (100kHz, 200mT) less than 350 kW / m<3> at the temperature of 25 DEG C to 120 DEG C, lowest loss of 300 kW / m<3> at the temperature of about 90 DEG C, and saturation magnetic flux density up to 450 mT at the temperature of 100 DEG C.