Soluble　poly　{(3-hexanoyl)pyrrole-[2,　5-diyl(p-tetradecoxybenzylidane)]}　(PHPDTBA)　was　prepared　by　ultrasonic　irradiation　and　its　structure,　thermal　stability　and　fluorescence　properties　were　characterized　and　analyzed　by　1H　NMR,　FT-IR,　UV-Vis,　XRD,　TG　and　FL.　UV-Vis　spectrum　showed　that　PHPDTBA　possessed　apparent　optical　absorption　at　the　range　of　300-500　nm.　PHPDTBA　existed　mainly　in　amorphous　manner　while　there　was　a　tiny　crystalline　region　according　to　XRD　spectrum.　The　thermal　weight　loss　process　of　PHPDTBA　had　two　phases,　the　fracture　of　hexanoyl　and　p-tetradecoxybenzyl,　with　the　initial　decomposition　temperature　of　195.19°C.　PHPDTBA　was　a　sort　of　deep　blue　fluorescent　material　that　the　stokes　displacement　was　77nm　with　a　fluorescence　quantum　yield　of　0.27　in　CH2Cl2.