'Worship of the Malayan Banyan tree' is a collection and introduction to characteristics of the custom to worship the Malayan Banyan (Si) tree - an unique cultural feature of the ancient belief of the Muong people in Lac Son, Hoa Binh. Main content of the book consists of three chapters. Chapter 1: Be belief to worship the Malayan Banyan tree, introduction to the symbol of the Si tree in Muong culture (in nature and daily life, in epics and myths) and in the folk beliefs. Chapter 2: The worship ceremony to full the Si branch to sky. Chapter 3: What to see over the ceremony to full the Si branch to sky, analyze of view over the world and human life of the Muong through the tradition to worships the Si tree.