Abstract: The PAC used in the current project has large aggregate size and single composition, and concrete strength is low. Therefore, the engineering application of PAC is limited. In order to improve the compressive strength of prefilled aggregate concrete, the effects of preparation method, slurry material type and coarse aggregate gradation composition on the compressive strength of prefilled aggregate concrete were studied. The results show that vibration grouting and layered grouting contribute more to the strength of concrete than self-filling grouting. The closer the coarse aggregate accumulation degree is, the smaller the voidage is, and the higher the compressive strength of preplaced aggregate concrete is. The strength of PAC made with high fluidity mortar is higher than that made with clean slurry. Using discontinuous graded coarse aggregate (10 ~ 20 mm∶20 ~ 25 mm= 2∶8, voidage 37%) and high-strength and high-fluidity mortar (330 mm expansion, 28 d compressive strength of 72.2 MPa), the preplaced aggregate high-strength concrete with 28 d compressive strength of 69.4 MPa can be prepared by single vibration molding.