介绍了熔锥型偏振分束器的原理，提出了一种新型的制作偏振分束器的方法。与以往的制作方法相比，所采用的方法简便易行。实验中，我们用一个低温热源加热耦合段，并采用圆偏振１３１２ｎｍ激光源作为监测源，在功率转换曲线上第一个偏振调制点处停止熔拉操作。结果表明，在波长为１３１２ｎｍ时，偏振分束器直通臂和耦合臂的消光比分别达到了－１４．１４ｄＢ和－１４．１１ｄＢ。 The principle of cone-shaped polarization beam splitter is introduced, and a new method of making polarization beam splitter is proposed. Compared with the previous production methods, the method used is simple and easy. In the experiment, we used a low-temperature heat source to heat the coupled sections and a circularly polarized 1312nm laser source as a monitoring source to stop the melt-pulling operation at the first polarization modulation point on the power transfer curve. The results show that the extinction ratio of the direct arm and the coupling arm of the polarization beam splitter reaches -14.14dB and -14.11dB respectively at the wavelength of 1312nm.