The invention discloses an aluminum-carbon catalyst for treating organic wastewater, and is mainly put forward for enlarging the application range of catalysts. The aluminum-carbon catalyst for treating organic wastewater is an aluminum-carbon sphere which consists of the following materials in percentage by weight: 50-90% of aluminum, 9-49% of carbon and 1-20% of a binder. The aluminum-carbon catalyst for treating organic wastewater adopts aluminum as electrode; aluminum is amphoteric metal which can generate reaction with acid or alkali, so that aluminum has more advantages than iron when being used for treating wastewater under alkali conditions. The aluminum-carbon catalyst for treating organic wastewater has the advantages of being large in specific surface area, strong in activity and free of passivation and hardening.