In order to make clear PVA fiber reclaimed concrete splitting tensile strength of the size effect,the replacement rate of regenerated coarse aggregate,PVA fiber content and size were considered,the mechanical properties of 81 cubes were tested.In short,the replacement rate of regenerated coarse aggregate rises,after the RAC splitting tensile strength reduce after raise first.which is the most strongest when the replacement rate of RA was 25%,it is useful for PVA fiber to reduce the size effect of splitting tensile strength of RAC.With the development of PVA fiber content,their size effect raises first and then abates,0.1%PVA fiber makes it performance best.