The invention belongs to the technical field of glass fiber and relates to an enhancement type spinning high-strength and high-modulus glass fiber composition applied to the fields of electromechanics, chemical engineering, aircrafts and the like. The enhancement type spinning glass fiber composition is prepared from, by weight, 56-65% of SiO2, 15-21% of Al2O3, 9-18% of MgO, 5-13% of CaO, 0.1-4% of Y2O3, 0-0.8% of Li2O, 0.1-1% of K2O+Na2O, and 3% or less of other impurities. The enhancement type glass fiber composition is prepared through a tank furnace technological process, by means of optimization and combination of the oxide components and particularly the introduction of Y2O3, the melting temperature, the clarification temperature and the shaping temperature of the enhancement type glass fiber composition are reduced under the situation that high strength and high modulus are guaranteed, the temperature difference between the shaping temperature and the liquidus temperature is increased, the wiredrawing situation is improved, and the enhancement type glass fiber composition is beneficial to the industrial production of high-strength and high-modulus fibers.