The invention provides a Czochralski single-crystal growth furnace in order to solve the technical problem of reducing the argon gas consumption of the Czochralski single-crystal growth furnace. The Czochralski single-crystal growth furnace comprises an argon gas input pipe and an annular gas distributor which is communicated with the argon gas input pipe, and is characterized in that: the pressure of argon gas inputted through the argon gas input pipe is between 0.8x10 < 3 > and 0.9x10 < 3 >Pa, and the flow rate of the argon gas is 30 liters per minute. The Czochralski single-crystal growth furnace also comprises a bowl-shaped air flow guide device which is arranged between the lower part of a crucible supporter and an air outlet, wherein, the bowl-shaped air flow guide device comprises a center shaft hole, a pair of electrode holes, and a ventholes which are opposite to the air outlet; a graphite center shaft passes through the center shaft hole of the air flow guide device; electrode poles respectively pass through the electrode holes; the air outlet is communicated with the ventholes of the air flow guide device; and the upper end part of the air flow guide device is arranged between an insulated cylinder and a heating element.