The　condensed　polynuclear　aromatic　(COPNA)　resin　was　synthesized　using　coal　tar　pitch　as　monomer　and　terephthalic　aldehyde　as　cross-linking　agent　in　the　presence　of　p-toluene　sulfonic　acid.　Reaction　mechanism　was　studied　using　FT-IR　and　1H-NMR.　TGA-DSC　was　employed　to　study　the　thermal　behavior　of　COPNA　resin.　Furthermore,　the　relation　between　react　time　and　different　content　of　COPNA　resin　was　investigated.　The　results　show　that　coal　tar　pitch　and　terephthalic　aldehyde　can　be　used　to　synthesize　COPNA　resin.　The　COPNA　resin　possesses　good　thermo-stability　and　high　coke　value.　Moreover,　the　resin　has　good　processablity　and　excellent　bonding　performance　as　well.