The invention discloses a water driven fertilizer irrigation device, and belongs to the technical field of agricultural tools. The water driven fertilizer irrigation device comprises a housing and a water pump, wherein a water inlet pipe and a water outlet pipe which are communicated are arranged on two sides of the housing, a turbine which can rotate along with water streams is arranged in the housing, the turbine is coaxially connected with an impeller of the water pump, a water pump inlet of the water pump is connected with a fertilizer suction pipeline, and a water pump outlet of the water pump is communicated with the water outlet pipe through a pipeline. The water driven fertilizer irrigation device is of a pure mechanical structure, only uses the internal water streams as power to drive the water turbine to move in work, does not rely on other power sources, can accurately apply fertilizer, and is used in various water-saving irrigation devices of micro irrigation, spray irrigation and the like, and the water driven fertilizer irrigation devices different in structure parameter can be disposed according to different water-saving irrigation technologies.