The invention relates to a hydrogel scar patch for softening and fading scars. The invention is characterized in that: besides serving as a drug delivery platform, a gel plaster also can treat scars; it has good therapeutic effects on scars, can soften and fade scar tissues, and can flatten scars. The principle of the hydrogel scar patch is based on a gel plaster's hydrophilic matrix, which has the characteristics that: 1. the hydrophilic gel matrix has a high moisture content up to over 70%, can actively hydrate scar skin, and the hydration degree is high, thus being more conducive to softening and flattening of scars; and 2. the hydrophilic gel matrix generates mechanical compression on skin surfaces, thus exerting a mechanical pressure on scar bodies.