Abstract: This paper convert the XML's tree structure to meta table and propose a definition of XML metatable, structure statistics table and their generation algorithms,combined with the meta table to hold the structure of the XML structural data,designing a meta table-based querying XML compression method M TQC (MetaTable Queryable Compression),compression and queries on XML data.Experiments show that in the meta table,queries on structure statistics table processes will become more simple, and M TQC has an excellent compression performance and query efficiency.