It is said that the alleged author of Qian Jin Yi Fang, a supplement to Bei Ji Qian Jin Yao Fang is SUN Si-miao. It is claimed that, based on the relevant historical materials, there are overlapping contents, principle differences in the academic ideas between the two books. Moreover, there are differences between the texts of Qian Jin Yi Fang cited by Wai Tai Mi Yao and the modern version of Qian Jin Yi Fang, all these texts are not from the original Qian Jin Yi Fang. It can be concluded that the author of Qian Jin Yi Fang is not SUN Si-miao.