The present invention relates to an air supply fan structure for an all-day combustion gas boiler, and in particular, a fan body screwed with a fan cover and having an impeller for sucking and amplifying and discharging the mixed gas and air therein, and a drive wrapped outside by a case. Provide an air supply fan consisting of a fixing ring for fixing the motor and the impeller, the streamlined wing structure formed in the impeller influences the load pressure of the air supply fan and in the axial direction the inner portion of the load in the air supply starting from the forward direction Increasing the pressure, the outer portion is formed in the rear direction inclined to the rear portion rather than the rotation direction to increase the air volume, so that the high load and high air volume generated by the air supply fan during use, mixing all the air necessary for complete combustion into the primary air So that it can be burned.
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