Membrane filtration technology plays a crucial role in the field of water treatment because of its efficient separation and purification capability. However, it remains a major challenge to develop reusable membranes with high retention, stable filtration to remove heavy metal ions and dyes from water in the field. In this study, sodium alginate (SA), cellulose nanofibers (CNF) and metal-organic frame UiO-66 were innovatively used as raw materials to prepare SA/CNF/UiO-66 dual-network composite hydrogel membrane by unique cooking method. UiO-66 was homogeneously distributed within the SA matrix with the help of CNF, thereby achieving a synergistic interaction among the three components. As a result, the SA/CNF/UiO-66 composite hydrogel filter membrane not only showed excellent water flux and excellent mechanical properties, but also possessed excellent performance in improving the filtration efficiency and long-term filtration stability of heavy metal ions and dyes. The optimal removal rates of 200 mg/L Pb