The invention relates to a high-performance rare earth composite ferrite with low temperature coefficient and a manufacturing process technology thereof, which is characterized in that: (1) burdening is carried out according to a stoichiometry mol ratio that is as follows: Sr1-XPX (Fe12-YMy) 2O19, wherein, X is less than or equal to 0.55 and is more than or equal to 0.03; Z is less than or equal to 1.3 and is more than or equal to 0.6; M is equal to Zn, Ca, Al, Co and Si; evenly mixing, pelleting, sintering at a temperature of 1190 to 1210 DEG C for 1 to 1.5h, grinding, adding with dimethylbenzene, molding in a magnetic field and multi-section sintering at a temperature of 1210 to 1240 DEG C are carried out in sequence; (2) according to Ba1-XPX (Fe12-YMY) 2O19 (wherein, X, Z and M are the same as (1)), preburning at a temperature of 1280 to 1295 DEG C for 2h, milling, molding in a magnetic field and multi-section sintering at a temperature of 1000 DEG C and 1150 DEG C to 1300 DEG C are carried out in sequence. Temperature coefficient is improved and magnetic performance is increased. High-quality ferrites with high performance and low temperature coefficient are obtained.