A silafluorene metalloporphyrin- benzene organic semiconductor material and preparing method and uses thereof are provided. The structure of the silafluorene metalloporphyrin- benzene organic semiconductor material is defined by structure formula (I): wherein: n is an integer between 1 and 100, R1, R2, R3, R4 are H, alkyl with C1-C32, phenyl, alkyl benzene or alkoxyl benzene containing one or more C1-C32, M is a metal ion. The silafluorene metalloporphyrin- benzene organic semiconductor material has good solubility, high carrier mobility, strong absorbance, wide absorbent range to light and elevated utilization ratio of solar light. Besides, the process of the preparing method is simple and easy to operate and control.