Among the many Mahayana scriptures, “Vimalakirti Sutra” is the only one that records the preach of the secular devotee, and is one of the few scriptures included into Chinese culture. Basing upon “Prajna Sutra”, “Vimalakirti Sutra” has the character of demonstrating “sunya” with the methodology of negation. Discussing the main idea and the dissemination of “Vimalakirti Sutra”, this paper is to prove that its character was as important as “sunya” and nothingness during the East and West Tsin Dynasty.