The invention discloses equipment for treating kitchen waste by using solar energy and a heat pump through a short flow. The equipment is characterized by comprising a closed space body provided with a composite membrane (1) on the upper side face; a transmission belt (2) is arranged below the composite membrane (1); a heat storage board (3) is arranged below the transmission belt (2); a heat exchange rack pipe is arranged inside the heat storage board (3); and a kitchen waste inlet (5) is arranged at one end of the closed space body, and a dry particle kitchen waste outlet (6) is arranged at the other end of the closed space body. In a relatively closed space, treated sewage is heated under the irradiation of sunlight when light exists in daytime, so that the sewage is evaporated at a low temperature; when no sunlight exists in a cloudy day or at nights, fog which is heated and evaporated by heat supplied by a heating pump is condensed to be condensed water after passing through the composite membrane, and the generated condensed water is discharged in time through discharge grooves/pipes; and the residual dry kitchen waste particles with a certain granularity can be comprehensively used as animal protein feed or for other purposes. The equipment is simple and practical and is low in cost.