NOVELTY - An organic semiconductor material comprises metalloporphyrin-diazosulfide.    USE - Organic semiconductor material useful for organic solar battery, organic electroluminescence device, organic field effect transistor, organic optical storage, organic non-linear device or organic laser device (claimed).    ADVANTAGE - The organic semiconductor material has good film forming property, strong absorbance and wide light absorbing range for improving using rate of sunlight. It has better thermal and environmental stability. It can be prepared with simple technique, easy operation and control.    DETAILED DESCRIPTION - An organic semiconductor material of structure (I) comprises metalloporphyrin-diazosulfide.    n=1-100;    R1-R4=H, 1-32C alkyl, Ph, alkylbenzene or alkoxylbenzone; and    M=metal ion.    An INDEPENDENT CLAIM is included for preparing a metalloporphyrin-diazosulfide organic semiconductor material comprises:    (A) dissolving dipyrromethane, first silicon fluorene derivative, and second silicon fluorene derivative in first organic solvent containing oxidizing agent and first catalyst in mol ratio of 1:(1-100):(1-100); reacting at 20-100 degrees C for 1-24 hours to obtain a silicon fluorene porphyrin derivative;    (B) adding silicon fluorene porphyrin derivative and brominating agent in second organic solvent in mol ratio of (1-2):(1-5); reacting at 0-120 degrees C for 1-72 hours to obtain dibromo silicon fluorine porphyrin derivative;    (C) dissolving dibromo silicon fluorene porphyrin derivative in third organic solvent; adding M metal ion solution; stirring at 0-30 degrees C for 0.5-24 hours to obtain dibromo silicon fluorene metal porphyrin derivative, where mol ratio of dibromo silicon fluorene metal porphyrin derivative to M metal ion is (1-1):(1-5);    (D) dissolving the dibromo silicon fluorene metal porphyrin derivative 4,7-bis(tributyltin)-2,1,3-diazosulfide with in fourth organic solvent containing second catalyst in anaerobic environment; processing Stille coupling reaction at 50-120 degrees C for 12-72 hours to obtain the metalloporphyrin-diazosulfide organic semiconductor material.