The invention discloses a multifunctional foldable bed which comprises a supporting bed plate, a bed head, a bed head bracket, bed body supporting legs, a separated table surface, a supporting frame main shaft, a bracket, main shaft lock catches, a stretching rod and a bed body fixing bracket, wherein a bed body is divided into four parts; the bed head and a bed tail part are folded to serve as a chair and a backrest and are connected and supported by a bottom shaft rod; a disk is arranged in the middle of the bed and lifted as the table surface; the main shaft is used for connecting and supporting the whole bed body bracket; the two ends of the main shaft are connected with the stretching rod; the bracket is sleeved on the main shaft and connected with the table surface; lock catches slide to push the table surface to be lifted; locking devices are arranged in the middle and on the two edges of the main shaft; the bracket and the bed head bracket are used for supporting the weight of the bed body. The multifunctional foldable bed can be folded into the table chair and the bed body according to the requirements of users, has multiple functions, and is small in occupied area and flexible and convenient to use, and the space is fully utilized.