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In this paper, two new types of partially precast steel reinforced concrete beams are proposed by combining the advantages of steel reinforced concrete beams, high strength concrete beams and precast assembly structures. Partially fabricated steel reinforced concrete beams are composed of precast high-strength concrete shell and cast-in-place concrete core area. In order to further reduce the dead weight of the members, partially fabricated steel concrete beam sections are hollow or can be filled with thermal insulation materials. In this paper, by using the superposition method and based on the existing test results, two new stiffness calculation methods for partially prefabricated SRC beams are proposed.