The invention provides a bed having a formaldehyde adsorption function. The bed includes a bed body and a formaldehyde adsorption mechanism accommodated therein. The formaldehyde adsorption mechanismincludes a fixing base, an adsorption cylinder, a flexible waterproof shield band, an adsorption cylinder driving member and a first controller. The adsorption cylinder is rotatably installed on the fixing base; a plurality of adsorption cavities are formed in the adsorption cylinder at interval and are filled with active carbon. A plurality groups of adsorption holes are arranged on the circumferential wall of the adsorption cylinder, every group of the adsorption holes being communicated with a corresponding adsorption cavity. The flexible waterproof shield band is fixedly connected with thefixing base and sleeves the circumferential wall of the adsorption cylinder, thus sealing the adsorption holes. The two opposite ends of the flexible waterproof shield band are in detachably connection, wherein a communicating space is formed between the two opposite ends, so that at least one adsorption cavity is communicated with exterior through the corresponding adsorption holes. The adsorption cylinder driving member is arranged on the fixing base and is connected to the adsorption cylinder. The first controller is connected with the adsorption cylinder driving member. The bed has the formaldehyde adsorption function.