Method for preparing polycarbonate with continuous two-phase interface phosgene method

The invention relates to a novel method for preparing polycarbonate with a continuous two-phase interface phosgene method, comprising the following steps: carrying out photochemical reaction on alkali metal hydroxide solution and organic phase to prepare polycarbonate oligomer emulsion, wherein bisphenol or polyphenol or mixture of the bisphenol and the polyphenol is dissolved in the alkali metalhydroxide solution, the alkali metal hydroxide solution accounts for 95-99.5 percent of the weight in the formula, and the organic phase contains phosgene; and carrying out coupling reaction on the polycarbonate oligomer emulsion and the residual alkali metal hydroxide solution to finally prepare polycarbonate resin. The method for preparing the polycarbonate with the continuous two-phase interface phosgene method is simpler in process than the existing method for preparing the polycarbonate, and the loss of the phosgene and the alkali liquor is reduced effectively.