A far infrared hair dryer, comprising: a body, which is provided with a fluid inlet formed in a rear end and a fluid outlet formed in a front end; a fluid flowing path, which is arranged in the body and extends from the fluid inlet to the fluid outlet; a conveying mechanism, which is arranged in the fluid flowing path and drives a fluid to flow from the fluid inlet to the fluid outlet; and a heating mechanism, which is arranged in the fluid flowing path and is used for heating the fluid in the fluid flowing path, wherein the fluid flowing path is provided with an annular cavity at a front section, and the fluid outlet is of an annular orifice structure abutted to the annular cavity; the heating mechanism is arranged in the annular cavity; and the heating mechanism comprises an annular heat radiation assembly wound in the annular cavity in a suspended manner, an annular heater embedded into the annular heat radiation assembly, a far infrared ceramic coating layer arranged on an outer surface of the annular heat radiation assembly, and a fixed support that is fixed in the annular cavity and is used for supporting the annular heat radiation assembly; the far infrared hair dryer is characterized that, the annular heat radiation assembly comprises a first annular body and a second annular body sleeving the first annular body; the annular heater resists against and is fixed between the first annular body and the second annular body; a plurality of uniformly arranged radiator fins are arranged around an inner side of the first annular body and an outer side of the second annular body; the far infrared ceramic coating layer is coated on the radiator fins; and the radiator fins are parallel to the fluid flowing path. a body, which is provided with a fluid inlet formed in a rear end and a fluid outlet formed in a front end; a fluid flowing path, which is arranged in the body and extends from the fluid inlet to the fluid outlet; a conveying mechanism, which is arranged in the fluid flowing path and drives a fluid to flow from the fluid inlet to the fluid outlet; and a heating mechanism, which is arranged in the fluid flowing path and is used for heating the fluid in the fluid flowing path, wherein the fluid flowing path is provided with an annular cavity at a front section, and the fluid outlet is of an annular orifice structure abutted to the annular cavity; the heating mechanism is arranged in the annular cavity; and the heating mechanism comprises an annular heat radiation assembly wound in the annular cavity in a suspended manner, an annular heater embedded into the annular heat radiation assembly, a far infrared ceramic coating layer arranged on an outer surface of the annular heat radiation assembly, and a fixed support that is fixed in the annular cavity and is used for supporting the annular heat radiation assembly; the far infrared hair dryer is characterized that, the annular heat radiation assembly comprises a first annular body and a second annular body sleeving the first annular body; the annular heater resists against and is fixed between the first annular body and the second annular body; a plurality of uniformly arranged radiator fins are arranged around an inner side of the first annular body and an outer side of the second annular body; the far infrared ceramic coating layer is coated on the radiator fins; and the radiator fins are parallel to the fluid flowing path.