Computer board for tap water treatment

The invention relates to a computer board for tap water treatment. The computer board comprises a shell, wherein the shell comprises an upper cover and a lower shell; a boss is arranged in the middle of the bottom part of the upper cover; a circle of groove for placing the first sealing ring is dug in the outer side of the boss; a circle of first cavity is formed in the outer edge of the bottom part of the upper cover; the groove is in through connection with the first cavity; the lower shell is a second cavity with an opening in one end; the computer board is arranged in the second cavity; the opening is in interference connection with the boss; a waterproof material is arranged on the inner side surface of the second cavity; a step is formed at the upper end of the lower shell; the step is sleeved with a second sealing ring corresponding to the first cavity; and the second sealing ring is in interference fit with the first cavity. The first sealing ring is arranged on the inner side of the shell, the second