Abstract: Xinjiang Astronomical Observatory (XAO) data center is infrastructure for scientific research needs in astronomy and provides scientific data service. The online custom uploading crossmatcher service of XAO data center accepts two kinds of inputs, remote URL and uploading the local file which must meet the requirements of VOTable format and contain the Unified Content Descriptors (UCD). Identified results can be sent to the standard Virtual Observatory tools for data visualization and other related processing via Simple Application Messaging Protocol (SAMP). The crossmatcher supports HTML, CSV, FITS Table and JSON, etc. data output formats. By using Q3C sky indexing scheme and parallel computing technologies, the crossmatch efficiency is increased greatly.