The invention relates to a voltage-doubling dual-cooling ozone generator. The ozone generator comprises a shell, a glass tube, a stainless steel inner cylindrical electrode, an outer cylindrical electrode, a gas inlet seat and a gas outlet seat, and further comprises a wind guiding piece, a centrifugal fan and a gas outlet piece, wherein the gas outlet piece comprises an outer sleeve, an inner sleeve and a reinforcement for connecting the inner and outer sleeves; the centrifugal fan is arranged at the opening of a fan seat; a wind inlet hole of the centrifugal fan is opposite to the cavity of the fan seat; one end of the wind guiding piece is connected with a wind outlet interface of the centrifugal fan, and the other end is in splicing connection with a sealing seat of the gas inlet seat; an annular clamping groove of the gas outlet seat is embedded in a first fixing hole at the gas inlet end of the shell; the connected end of the wind guiding piece and the gas inlet seat is embedded in a second fixing hole; a flange of the gas outlet piece is fixedly connected with a flange of the gas outlet seat; and a gas outlet part is inserted in the inner sleeve. The centrifugal fan takes in external cold air, and heat is taken away by a radiating fin, so that the temperature is reduced; and the opening of the fan blows wind to the inner wall of the inner cylindrical electrode, so that the heat of the inner cylindrical electrode is absorbed by air and is discharged out, thus prolonging the service life and increasing the ozone yield of the generator.