Abstract:The main hall of Baoguo Temple is the earliest existing wood structure architecture in Zhejiang and the only one of song style. The main hall of Baoguo Temple has high scientific and artistic value and has a long history. It is an important ancient wooden structure existing in China. For practical purposes, the architectural structure of the main hall of Baoguo Temple has not reduced the pillars and increased the scale of depth. The pillars in the temple are all made of melon shape, the architectural form is the same or similar to that of "Yingzaofashi".