An experimental study of the splitting tensile strength and compressive strength were carried out. Effects of PVA fiber was analyzed on ratio between splitting tensile strength and compressive strength. The dimensions of cubic specimens were 100 mm×100 mm ×100 mm. PVA fiber were added at the volume fractions of 0， 0.5%， 1%， 1.5%， 2% and the fly ash content were 30%, 50%. The test results indicate that， the compressive strength varies very little after incorporation with PVA fiber， however， the splitting tensile strength increases from 42.64% to 135.12% and the ratio between splitting tensile strength and compressive strength increases from 36.82% to 134.27%. What's more， the compressive strength of cementitious composite including fly ash at the ratio of 30% is 20% higher than that of 50%，and there is no obvious improvement on the splitting tensile strength with the change of fly ash content. This paper also shows that the compressive test cube of PVA fiber cementitious composites has multiple cracks and is hardly crumbled in the degradation process， and then the compressive toughness can be enhanced significantly.