The disclosure belongs to the technical field of ice packs, and in particular to a novel self-absorbent ice pack, including: an outer bag body and absorbent resin granules filling an inside of the outer bag body. The outer bag body includes a composite plastic layer and a water-permeable layer. In this solution, a semi-composite plastic strip is arranged in a middle part of the water-permeable layer, non-woven fabric surfaces on the two sides of the semi-composite plastic strip are respectively used for water inflowing and air evacuation, which improves the water inflowing efficiency and prevents the absorbent resin granules inside from oozing out. When water enters the inside of the ice pack and the ice pack swells, the semi-composite plastic strip protrudes. The ice packs contact mainly at the protruding semi-composite plastic strips. Thus, the surface is less likely to retain water or freeze and stick.