NOVELTY - Organic semiconductor material comprises metal porphyrin-triphenylamine.    USE - The organic semiconductor material is useful in organic solar battery, organic electroluminescent device, organic field effect transistor, organic photomemory, organic linear device and organic laser device (claimed).    ADVANTAGE - The organic semiconductor material is featured with wide light absorption range, higher solar utilization ratio and better stability and environmental stability. The preparation method is simple to carry out and easy to operate and control.    DETAILED DESCRIPTION - Organic semiconductor material comprises metal porphyrin-triphenylamine of formula (I).    n=1-100;    R1-R4=same or different H, 1-32C alkyl, phenyl, alkyl phenyl or alkoxy phenyl containing one or more 1-32C; and    M=a metal ion.    An INDEPENDENT CLAIM is a method for preparing an organic semiconductor material containing metal porphyrin-triphenylamine, comprising: (a) adding dibromotriphenylamine into a first organic solvent; cooling the solvent using liquid nitrogen/isopropanol to -78 degrees C; dripping n-BuLi and reacting at -78 degrees C for 0.5-5 hours; and adding 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; reacting at -78 degrees C for 0.5-5 hours and naturally heating the materials to room temperature and reacting for 1-48 hours to obtain 4-4'-di(4,4,5,5-tetramethyl-1,3-dioxaborolane) triphenylamine; (b) dissolving dipyrromethane, first silicon fluorene derivative and second silicon fluorene derivative into a second organic solvent including an oxidant and a first catalyst, and reacting at 20-100 degrees C for 1-24 hours to obtain a silicon fluorene porphyrin derivative; (c) adding the silicon fluorene porphyrin derivative and a brominating agent based on a mole ratio of 1:2-1:5 into a third organic solvent to react at 0-120 degrees C for 1-72 hours to obtain a dibromo silicon fluorene porphyrin derivative; (d) dissolving the dibromo silicon fluorene porphyrin derivative into a fourth organic solvent, and adding into solution containing M metal ion and stirring the solution at 0-30 degrees C for 0.5-24 hours to obtain a dibromo silicon fluorene metal porphyrin derivative; (e) in the oxygen-free environment, dissolving the dibromo silicon fluorene metal porphyrin derivative and the 4-4'-di(4,4,5,5-tetramethyl-1,3,-dioxaborolane) triphenylamine into a fifth organic solvent containing a second catalyst based on a mole ratio of 1:2-2:1, and performing Suzuki coupling reaction at 50-120 degrees C for 12-72 hours to obtain an organic semiconductor material containing metal porphyrin-triphenylamine.