The invention discloses a full-bamboo functional bed capable of adjusting hardness, a bed screen is fixed at one end of a bed frame, and a main body frame structure of the bed frame and the bed screenis made of bamboo; the bed frame is cooperatively provided with a rib frame and a mattress in sequence from bottom to top; the rib frame comprises a support frame and a plurality of rib strips mounted in the support frame; each rib strip comprises two or three layers of bamboo shrapnel, two metal sleeves sleeved at the two ends of the two or three layers of bamboo shrapnel and a hardness adjusting device connected to the bottoms of the two metal sleeves, and the hardness adjusting device is used for pressure regulation when the surfaces of the two or three layers of bamboo shrapnel are stressed. According to the full-bamboo functional bed capable of adjusting the hardness in the invention, a metal scale ruler is arranged on a rib frame base, as a scale for quantitative adjustment of the hardness of the rib frame, the more sliding blocks are adjusted to the two sides, the larger the scale is, and the larger the hardness of the rib frame is; and the hardness of each area of the bed surface can be adjusted and controlled in a quantitative manner, and the requirements for supporting various parts of crowds in different body types and weight are met.