本文对纳西东巴文中卐字的音、形、义及其来源、传入时间、传播路线等进行 了研究，结合纳西族与其周边民族间的文化交流史，认为纳西东巴文中的字源于古 印度文化中的于（ｓａｖａｓｔｉｋａ），后随佛教、苯教经西藏传入纳西族中。 In this paper, we study the sound, shape, meaning, origin, time and route of Naxi Dongba writing. Combining the history of Naxi and its neighboring peoples, we think that the characters in Naxi Dongba originated from ancient Indian culture (savastika), followed by Buddhism, Bon religion through Tibet into Naxi.