The invention discloses a piece of multifunctional furniture capable of being converted into a dining table or a sofa or a bed. The multifunctional furniture comprises a first bottom cabinet, a secondbottom cabinet and a turnover mechanism; the first bottom cabinet comprises a first cabinet body and a first cover plate, the second bottom cabinet comprises a second cabinet body and a second coverplate, a third cover plate is further hinged to the second cover plate, the bottom of the first bottom cabinet and the bottom of the second bottom cabinet are connected through a left stretchable rodand a right stretchable rod, the upper portion of the first bottom cabinet and the upper portion of the second bottom cabinet are detachably connected through bed buckles, and the turnover mechanism comprises a turnover plate, two fixed edgings, two movable edgings and a supporting assembly arranged below the turnover plate. The multifunctional furniture capable of being converted into the diningtable or the sofa or the bed is reasonable in structural design, low in cost and high in functionality; the furniture can have the functions of the dining table, the sofa and the bed, the space utilization rate is greatly increased, the cost performance is high, the furniture is particularly applicable to people in the small living space, and living can be improved.