With　the　development　of　big　data　to　medical　area,　more　and　more　researchers　use　authoritative　public　datasets　for　research.　In　the　field　of　lung　cancer　research,　Lung　Image　Database　Consortium　and　Image　Database　Resource　Initiative　is　the　largest　open　lung　image　database　in　the　world,　which　contains　CT　images　stored　in　DICOM　format　and　expert　diagnostic　information　stored　in　XML　format.　However,　data　cannot　be　used　directly　and　needs　to　be　further　processed.　To　solve　this　problem,　a　preprocessing　software　based　on　lung　CT　image　data　is　designed.　The　software　can　realize　the　preprocessing　of　lung　CT　image,　interprets　the　expert　diagnosis　information　completely,　and　visualizes　the　expert　annotation　results.　The　lung　CT　image　data　preprocessing　software　has　cross-platform　portability,　openness　and　sharing.　©　2019　Association　for　Computing　Machinery.