Abstract: Provided is a high-strength self-healing capsule and a supporting production process thereof, belongs to the field of self-healing of concrete, comprising: healing agent and maltose; further comprising: mixing cement, silica fume and expansive materials evenly to obtain healing agent powder; mixing the healing agent powder with maltose to obtain healing agent composite powder; pre-pressing the healing agent composite powder to form fine granules; sieving the fine granules made from the pre-pressing, and granulating to obtain capsule core granules; and spraying polyvinyl alcohol (PVA) solution to the capsule core granules, while blowing hot air to remove moisture on the surface of the capsule core granules, for the PVA solution to form a film on the surface of the capsule core granules, drying, and then obtaining.