A series of high molecular weight,readily soluble eopolymers of 9,9-dioctylfluorene with pyndine are synthesized by Suzuki polycondensation．The results indicate that the light-emitting color of the polymers could be midified by the introduction of pyridine units into the polynuorene backbone．The energy levels of the polymers are widened,and PL,EL spectra are blue-shifted by the introduction of the meta-pyfidine groups．However,the PL,EL spectra are red-shifted by the introduction of para-pyridine groups．The introduction of pyfidine units at 3,5- or 2, 6-position into polyfluorene backbone significantly depresses the excimer formation．The intensity of excimer emission decreases with increasing 3,5-pyridine content．Narrow and pure blue EL emission is obtained for the copolymer with 3,5-pyridine content of 40 mol％．Therefore,meta-pyridine-co-fluorene copolymers ate promising blue-emitting electroluminescent materials.