Silver is a kind of bactericidal material with strong antibacterial effect. Combined with activated carbon, it can purify and inhibit sterilization. It also has the effect of removing residual chlorine, which is more conducive to drinking water health. It is very suitable for water purifiers or water purification filter elements. use. The bactericidal effect of silver mainly depends on silver ions. The WHO stipulates that the safety value of silver to the human body is 0.05ppm. Therefore, the bactericidal inhibitory effect of silver ions must require that the silver contained in the activated carbon can slowly release silver ions, and the release process can neither be too much nor too little. There is a process that can make the silver in the product become nano-silver particles attached to the inside of the activated carbon pores, so that the slow release process of silver ions can be effectively controlled for a long time, so as to achieve the best sterilization inhibition effect.