The invention discloses a combined purification air conditioning unit special for a biological medicine laboratory, and relates to the technical field of biological medicine experiments. The combined purification air conditioning unit special for the biological medicine laboratory comprises a first machine box, a second machine box, a third machine box and a dust cleaning mechanism, the other side of the first machine box is provided with an opening, the two sides of the second machine box are provided with openings, one side of the third machine box is provided with an opening, and the first machine box is located on one side of the second machine box. Through cooperative use of a first fixing frame, a first rotating shaft, fan blades, a first transmission rod and a first bevel gear, a power mechanism can rotate the fan blades, outdoor air enters a room through the first machine box, the second machine box and the third machine box, then through cooperative use of a heater and a refrigerator, and the temperature of the air entering the first machine box, the second machine box and the third machine box is adjusted, so that the air with proper temperature enters the laboratory, and the growth environment of organisms in the laboratory is guaranteed.