Porous polyvinylidene fluoride (PVDF) membrane was successfully fabricated via phase inversion method. The surface and cross⁃section morphologies, and thermal stability of the samples were characterized by scanning electron microscopy and thermogravimetry⁃differential thermal analyzer. The adsorption property of PVDF membrane for Congo Red was investigated. The results showed that the most proper dosage of PVDF membrane is 30 mg. The maximum adsorption capacity of PVDF membrane for Congo Red is 64.6 mg/g at 303 K. The isotherm data followed the Freundlich isotherm model and the kinetic adsorption obeyed the pseudo⁃second⁃order model. Thermodynamic parameters illustrated that the adsorption process was spontaneous and endothermic. Ethanol has good desorption effect on PVDF membrane adsorbed by Congo red. After 8 adsorption⁃desorption, PVDF membrane still maintains high adsorption capacity for Congo red.