In this paper, electric field-induced quenching of poly(N-vinylarbaole) (PVK) doped with dyes was studied. The electric field-induced quenching results from the field-induced annihilation of the emitting species. Our researches show that the effect of electric field on photoluminescence is different for different excitation wavelengths. The difference-is attributed to the generation and recombination processes of exciton.