A mask for curing frame sealant and a liquid crystal display (LCD) panel manufacturing method are provided in the present invention. A gradient shading region is formed in a joining area between a shading region and a transparent region, such that the gradient shading region is integrally formed. When the mask is utilized for exposure, the irradiation transmittance in the gradient shading region is smaller than the irradiation transmittance in the transparent region, but the irradiation transmittance in the gradient shading region is higher than the irradiation transmittance in the shading region. The pre-polymerization reaction of the irradiated monomers occurrence can be avoided in the present invention, and the pre-tilt angles in the liquid crystal layer are kept to be all the same during the alignment process.