沈宠绥和徐大椿是继魏良辅之后,在南北曲唱念理论上前后相承,并分别做出卓越贡献的理论家。徐大椿的曲论虽承前人尤其沈宠绥而来,但其在继承中有发展、有新创。在前人理论基础上,他特别对沈宠绥论述未为完善的口法问题进行了全面探讨,并以口法为中心,贯穿探讨了曲唱从字音、腔格、板式到宫调、曲情等一系列问题,从而初步构建起系统的南北曲唱念理论体系,为后世成熟全面的曲论体系之建立,做出了突出的贡献。 Shen Sui Sui and Xu Dachun is the theorist who succeeded Wei Liang in the North and South song theory and made outstanding contributions respectively. Although Xu Diantun’s song theory is especially advanced from his predecessors, his inheritance has its own development and new creation. On the basis of his predecessors’ theory, he especially made a comprehensive discussion of Shen’s no-oral argument on the issue of sound oral law. From the perspective of oral law, he discussed the theme of singing, writing, And a series of questions, so as to initially establish a systematic theoretical system of North-South song and song singing, and make outstanding contributions to the establishment of a mature and comprehensive music theory system for later generations.