The utility model discloses multifunctional combination sofa which comprises a sofa seat, a handrail and a backrest, wherein fixed buttons are arranged on the surface of the sofa seat; more than 12 grooves are formed in the bottom surface of the sofa seat; sofa legs which are hinged through rotation shafts are arranged in the grooves; the sofa seat is equipped with a sofa cushion; the sofa cushion is internally filled with particle fillers; a waist protection cord and a neck protection cord are arranged at the front of the backrest; the handrail is of a hollow structure; the sofa cushion is equipped with a sponge sleeve which is sealed through a zipper; both the sofa cushion and the sponge sleeve are provided with fixed button holes; the fixed button holes are corresponding to the fixed buttons; the handrail is internally provided with a desk lamp; a desk lamp switch and a power connector are arranged at the outer part of the handrail; a transparent turnover cover is arranged on the handrail; a desk lamp holder is arranged at one side of the handrail; and the sofa seat is provided with a drawer type stepping station. The multifunctional combination sofa is designed according to the human body structure, and thus is high in comfort, multifunctional and convenient to use.