An ultraviolet flame sensor and a manufacturing method thereof relate to a solar blind type ultraviolet flame sensor. The invention provides the ultraviolet flame sensor with simple structure, small size, high stability, high strength and high linearity and sensitivity, and the sensor manufacturing method with good versatility, simple technique and low cost. The invention is characterized in that: the ultraviolet flame sensor comprises a uviol piece, a meshed anode which is arranged on the uviol piece, a cathode substrate glass piece, a photocathode which is arranged on the cathode substrate glass piece, a glass ring which is arranged between the cathode and the anode, a vacuum orifice which is arranged on the glass ring, a plastic packaged base which is arranged under the cathode substrate glass piece, a cathode and an anode lead which are adhered to the plastic packaged base and are respectively connected with the cathode and the anode, and a plastic casing which is arranged around the plastic packaged base, the glass ring and the glass piece.