In this paper the author points out the algorithm of reckoning by the abacus in SUAN FA TONG ZONG, focuses the analysis of the new algorithm, and expounds the importance of the algorithm in researching and teaching of reckoning by the abacus.

• 指出了《算法统宗》中所含的珠算算法；重点分析了其中的新的珠算算法；并阐明了这些算法在珠算研究与教学中的意义.