Association Mining Technique to Boost the Performance of XML QA Support Scheme XML actually developed as a benchmark for caching, dispense and interchanging data over multiple platforms. The XML data is on the grow over the time in fast rate. Enterprises want formulating queries on XML datasets habitually. As giant XML data is retrievable, it is not easy job to pull out vital data from XML dataset. It is computationally expensive to answer queries without any sustain. Towards this, in this paper we introduce a method known as Tree-based Association Rules (TARs) mined policy that make available necessary info on structure and content of XML file and the TARs are also placed in XML design. The extracted data (TARs) used in future on for XML query answering support system. This technique gives rapid and precise answer. We have also introduced a model to show the usefulness of the designed structure. The experimental outcomes are very accommodating and query answering is likely to be important in real time uses.