The invention relates to a keyboard and specifically relates to a keyboard with an air purification function. The keyboard with the air purification function comprises a keycap and a keyboard body. A power generation device capable of generating electric energy is arranged on the keyboard body. The keyboard also comprises negative ion generators capable of generating negative ion wind. The negative ion generators are arranged at one side of the keycap facing the keyboard body. The negative ion generators are built in the keyboard. When the keycap is pressed, the negative ion wind is generated and discharged. According to the keyboard, through smart combination of the internal structure of the keyboard and utilization of the press action of the keyboard, power is supplied to the air purification devices, the air purification devices work to generate the negative ion wind, the negative ion wind is released to surrounding space of a computer worker without employing devices such as an air pump, the air can be purified in high efficiency, the odor can be removed, the floating bacteria can be filled, and the indoor air quality is ensured.