The invention relates to a multifunctional energy-saving washing machine. A small tray is coaxially arranged on the bottom of an inner drum fixedly; an output shaft is coaxially embedded in the middle of the outer end of the small tray; a worm gear and a spur gear sequentially sleeve the outer end of the output shaft from inside to outside; an outer drum is hinged to a support, and can be converted from a horizontal state to a perpendicular state or from the perpendicular state to the horizontal state by using a handle; when the outer drum is in the horizontal state, the worm gear on the output shaft is meshed with a worm arranged above the worm gear, and is connected with an input shaft through a transmission device; when the outer drum is in the perpendicular state, the spur gear at the outermost end of the output shaft is exactly connected with a motor gear fixedly arranged on the lower portion of the support in a meshed manner; and high-speed rotation of the inner drum is controlled by a motor and a control box. By using the washing machine, the shortcoming that the existing washing machine only can be driven by using electric energy, and cannot be driven by other forms of energy is overcome. The multifunctional energy-saving washing machine can be directly driven by various types of mechanical energy, has functions of an electric washing machine, and is multifunctional.