Severe open wounds should be closed immediately and regularly undergo re-examination and debridement.Therefore, dressings should effectively cover the wound, creating a moist environment for healing whilemeeting mechanical requirements for daily movement and adaptability. Herein, a low-cost and easy-to-prepare plant polysaccharide hydrogel was reported. The Mesona chinensis Benth polysaccharidestrengthened the hydrogel network by hydrogen bonding and changed the phase transition temperature,but retained the thermal response characteristics of the hydrogel. By adjusting the polysaccharideconcentration, MepGel(1) can be prepared to remain stable as a semisolid at body temperature andtransform into a shear-thinning semifluid state when appropriately heated. The composite hydrogel couldbe easily shaped, effectively closing wounds of different shapes, while maintaining excellent mechanicalproperties. Importantly, this composite hydrogel had a near-infrared photothermal effect resulting inexcellent antibacterial effect and collided with its own thermal response producing functions conducive towound care, like accelerating the self-healing of the dressing, achieving re-adhesion, and further coveringthe wound. Furthermore, the hydrogel had excellent biocompatibility, enhancing immunity and promotinghealing of bacterial-infected wounds. The low cost and rich functionality demonstrated by MepGel had thepotential to face the enormous challenges and economic burden of clinical wound healing.