The invention discloses a czochralski silicon monocrystal growth furnace and a method for filling silicon melts continuously. In the czochralski silicon monocrystal growth furnace, a monocrystal lifting part comprises a lifting head, a slave furnace chamber, an isolating valve, a furnace body, an upper part heat-preserving cover, a heater, a crucible lifting rotary mechanism, a graphite crucible, a crucible, a steel wire rope, a chuck and the like; a melt continuously-filled part comprises a small furnace cylinder, a charging bin, the isolating valve, a charging and weighing device, a continuously-melted tube, a heat-insulating body, the heater, a melt temperature stabilizing tube and the like; and by the czochralski silicon monocrystal growth furnace, the continuous melting of polycrystalline silicon and the continuous growth of silicon monocrystal are realized. In the czochralski silicon monocrystal growth furnace, a spacing interval of opening a mono-crystal furnace for two times adjacently can be prolonged by over 30 days, the size of the crucible can be reduced effectively, the consumption and oxygen content of the czochralski silicon monocrystal growth method can be reduced effectively, and the production efficiency can be improved.