The invention relates to a filtering detection pipeline type liquid radiating device. A band-new design structure is used, a nested structure that an outer pipe (1) and an inner pipe (2) are embedded with each other is designed, based on the flowing of liquid designed in the inner pipe (2), a temperature difference between a clearance environment between the outer pipe (1) and the inner pipe (2) and an area to be radiated where the outer pipe (1) is located is generated, and the convection between the air of the area to be radiated where the outer pipe (1) is located and the air of the clearance environment between the outer pipe (1) and the inner pipe (2) is realized through ventilation holes (9) in the surface of the outer pipe (1); meanwhile, a temperature detection result for the area to be radiated where the outer pipe (1) is located from a temperature sensor (5) is obtained through a filtering circuit (10), the operation of a fan (6) designed and located at the open end of the outer pipe (1) is controlled, and the flowing for air in the clearance environment between the outer pipe (1) and the inner pipe (2) is accurately guided, so that the radiating work efficiency of the filtering detection pipeline type liquid radiating device designed in the invention in the practical application process is effectively guaranteed.