Continuous re-feeding production method of solar-grade Czochralski silicon

The invention relates to a continuous re-feeding production method of the solar-grade Czochralski silicon. The method comprises the following production processes: performing primary charging, performing primary melting, performing secondary charging, performing secondary melting, pulling single crystals, taking out silicon rods, re-feeding, melting, pulling single crystals, taking out the silicon rods, and closing and cleaning the furnace, wherein the processes of re-feeding, melting, single crystal pulling and silicon rod taking can be performed repeatedly according to the life of a crucible and the running condition of a coil base to realize the continuous production of the one-heat multiple single crystals. By adopting the method, the production cost can be effectively reduced, the production efficiency can be obviously increased and the problems of the existing solar-grade Czochralski silicon production, such as insufficient primary feed capacity, low crucible utilization rate and more crucible bottom material residues, can be solved.