The invention discloses a water-based extraction method for taraxacum rubber. The method comprises the following steps: (1) cleaning dry roots of Taraxacum kok-saghyz, and drying the cleaned roots atroom temperature; (2) preprocessing the roots by a rolling and kneading machine, a rolling tank or a stirring machine, and removing residues to obtain residues containing rubber threads; and (3) adding water into a mixture containing the rubber threads, performing stirring at a high speed, and settling and separating the obtained mixture to obtain the taraxacum rubber. Only water is used for extraction in the whole extraction process, so environmental protection is truly achieved; and water has a low price, so the problem of high cost of a solvent in a traditional solvent extraction method fortaraxacum rubber is solved.