The invention discloses a wastewater purification device convenient in sewage utilization and belongs to the field of wastewater purification. The wastewater purification device convenient in sewage utilization comprises a water inlet pipe, a coarse filtering pool, a fine filtering pool, a sedimentation pool, a microorganism purification pool, a disinfection pool, an aeration pool, a membrane pooland a water outlet pipe; the coarse filtering pool, the fine filtering pool, the sedimentation pool, the microorganism purification pool, the disinfection pool, the aeration pool, the membrane pool and the water outlet pipe are sequentially communicated with one another; the microorganism purification pool is sequentially provided wit a plant layer, a first fine stone layer, a rubble layer, a second fine stone layer and a immobilized microorganism plate from top to bottom; the fine filtering pool is connected with the sedimentation pool through a fine filtering pipeline; the water outlet pipeis slantingly arranged; multiple electromagnets are arranged on the water outlet pipe at an equal interval; the lower side of each electromagnet attracts an aeration device; the water outlet pipe isinternally provided with an ultraviolet sterilization device; and the ultraviolet sterilization device is composed of a solar panel, a storage battery and an ultraviolet sterilization lamp. By adopting the wastewater purification device provided by the invention, sewage is subjected to a series of sewage treatment processes, so that comprehensive purification treatment of the sewage is realized, and the purification degree of the sewage is increased.