A polymer reconfigurable micro-ring resonator filter,which is based on inverted ridge waveguide structure using ZPU-44and polysulfone (PSU) as the wavegui de cladding layer and core layer materials,respectively,is theoretically designed and optimized,inc luding the waveguide cross section size,the bending radius,the coupling length,the coupl ing gap size, and the thermo-optic tuning electrode parameters.In addition,the characterist ics of the polymer reconfigurable micro-ring resonator filter are analyzed.The polymer reconfigur able micro-ring resonator,which is fabricated by the traditional micro processing technology,is tested,and the results show that around the wavelength of 1550nm,the free spectral range (FSR),3dB bandwidth and quality factor Q of the polymer reconfigur able micro-ring resonator are 0.15nm, 0.0235nm and 6.60×10⁴,respectively.What′s more,the extin ction ratio of the micro-ring resonator filter can be tuned from 0.5dB to 12.95dB in the voltage range from 0V to 4V .And only 4.75V is needed to tune the resonant wavelength of the micro-ring resonator filter ac ross an FSR,which is nearly the same as the simul ation re sults.The reconfigurable polymer micro-ring resonator filter is very useful for integrated waveguide tunable opt ical delay line and tunable filter.