Abstract: A liquid-proof stitched fabric and a stitching method therefor. The liquid-proof stitched fabric comprises multiple liquid-proof fabric layer units stitched by means of a heat-sealing method, each of the liquid-proof fabric layer units comprises: at least one liquid-proof film layer, at least one thermoplastic non-woven fiber layer, and a discontinuous bonding layer located between the at least one liquid-proof film layer and the at least one thermoplastic non-woven fiber layer. The heat-sealing temperature of the heat-sealing method is lower than or equal to a complete melting temperature of the liquid-proof film layer, but is higher than a maximum start melting temperature of the thermoplastic non-woven fiber layer. By means of adopting a multicomponent liquid-proof film layer having two or more melting ranges, the range between the start melting temperature and the complete melting temperature can be broadened, and the stitching process can be widened.