The invention relates to a dogwood kernel modified active carbon water purifier, which is prepared from the following raw materials in parts by weight: 50 to 60 parts of dogwood kernel, 9 to 12 parts of calcined gypsum, 5 to 6 parts of dried alum, 10 to 15 parts of lignocellulose, 6 to 9 parts of calcium-based montmorillonite, 3 to 5 parts of milk protein, 8 to 10 parts of acrylonitrile, 1 to 2 parts of ammonium persulfate, 100 to 110 parts of active carbon, 7 to 9 parts of gelatin, 10 to 13 parts of chitosan, 4 to 5 parts of modified diatomite and an appropriate amount of water. After the dogwood kernel is carbonized at a high temperature, a structure with multiple pores and strong adsorption capacity is formed, so that the cost is saved and the environmental pollution is reduced; due to use of the macromolecular compounds such as acrylonitrile, gelatin, lignocellulose and chitosan and the like, the adhesive force can be increased, the disintegration is unlikely to happen, an effect of chelating metal ions can be realized, and safe and non-toxic effects are achieved; due to use of calclium-based montmorillonite, an antibacterial function, a deodorizing function and an ion exchanging function can be achieved; due to use of the calcined gypsum and the dried alum, a sterilizing function can be achieved; the dogwood kernel modified active carbon water purifier is safe, healthy, low in cost and particularly suitable for water purification.