Three kinds of porphyrins which can abbreviate as TPP, TPPCu and TMPPFeCl were synthesized by one-step method with mixed solvents. Then these porphyrin materials were used as donors to fabricate organic solar cells with PCBM as accepter by the solution processing of spin-coating method. The structure is ITO/porphyrin∶PCBM/Al. The photovoltaic characterizations of these devices were investigated. The device based on TPP∶PCBM shows the best performance with an open circuit voltage (VOC) of 0.52 V, a short circuit current (JSC) of 0.98 mA·cm-2, and fill factor (FF) of 30.1%. Then the influence of different weight ratio of TPP∶PCBM was researched. The best weight ratio of TPP∶PCBM is 1∶1. Increasing or decreasing the quatity of TPP would make JSC and VOC of the device deterioration and have little effect on the FF.