In order to improve the overall fracture resistance of building structures, modern housing buildings are constructed by applying high-strength cementitious composites to the key stress positions of building beam and column nodes. In this paper, PVA-FRCC composites were prepared by using cement, quartz sand, fly ash, and PVA fibers with composite material theory, fiber spacing theory, and fiber orientation distribution as the theoretical basis. For the mechanical properties of this material, it was verified by compressive and tensile tests, and the influence of fiber orientation coefficient on mechanical properties was analyzed. In order to analyze the crack resistance of the material applied in modern housing construction, the tests were carried out from the dimensions of PVA doping and PVA length, respectively.The PVA fiber doping has a greater impact on the compressive strength of high-strength cementitious composites, and the compressive strength of 2.4% PVA fibers doped into the composite material can be up to 47.34±6.14 MPa.The tensile ultimate stresses with the increase of PVA fiber doping were all shown to be increased firstly and then decreased. The tensile ultimate stress showed an increasing and then decreasing trend with the increase of PVA fiber dosage. The length of the doped fibers is 10-18mm, which can delay the appearance of early cracks in the composites. The combination of PVA fibers and Gaucho Du cementitious composites can better prepare building materials to meet the needs of modern housing construction crack resistance, and better ensure the safety of housing construction.