The invention discloses an automatic BBS (bulletin board system) page acquisition method. The method comprises the following steps: 1, acquiring all element information of a BBS page; step 2, cross-contrasting node elements in a system library; step 3, comparing the node quantity if the node name is identical; step 4, determining the node name and the node quantity are respectively identical, and cross-contrasting two node identifiers as a current floor node; step 5, recording XPath of the floor node, segmenting the floors of a post, extracting the XPath of the floor content, and acquiring the universal information. A majority of BBS sites can be processed by automatically analyzing an html structure, the acquisition development efficiency can be effectively improved, the acquisition system structure is optimized, the acquisition flow is simplified, and a novel high-efficient solution is provided for the large-scale acquisition system.