Abstract: Temporal index schema is a basic approach for temporal XML data operation and it is critical for improving the efficiency of indexes of the cooperative integration between temporal information and structural information. Based on temporal quasiorder and temporal coding, a temporal XML Snapshot index, Txmlsindex, which implements querying with “one time one set” and reconstructs structure with coding Tcodes is studied. Besides, the related simulations show that the feasibility and effectiveness of Txmlsindex are superior to the literature. The technological frame and index schema of this paper can be expanded to normal query process of temporal XML.