Abstract: By analyzing main influential factors of tensile strength of RCC, and comparing the similarities and differences between the splitting and axis tensile strength, collecting lots of project data about splitting tensile strength, axis tensile strength and conpressive strength of RCC, we can draw a rough conclusion: the increasing rate of splitting or axis tensile strength ofRCC and its date is logarithmic; The relations between splitting tensile strength and axis tensile strength, compressive strength and splitting or axis tensile strength are linear. The five regressive equations are listed in the text. The aim of this text is to provide the credible evidence for existing theory and practice.