The invention discloses a kitchen fresh air ventilation, oil smoke purification and air conditioning combined unit, and belongs to the technical field of fresh air ventilation and air conditioning. The kitchen fresh air ventilation, oil smoke purification and air conditioning combined unit comprises an air conditioner indoor unit, an oil smoke direct discharge pipe, an oil collecting box, a liquidinlet pipe, a gas return pipe, a range hood, an oil smoke outlet pipe, an oil smoke purification discharge pipe, an air conditioner oil removal device outdoor unit, an air conditioner oil removal device system, an oil smoke three-way pipe, a fresh air inlet pipe, a fresh air purifier, a fresh air distributing pipe, a fresh air distributing box, a fresh air front face outlet and a fresh air curtain outlet, the air conditioner oil removal device system comprises six three-way pipes, a four-way electromagnetic reversing valve A, a four-way electromagnetic reversing valve B, a condenser, an oil removal device, a capillary pipe A, a capillary pipe B, a stop valve A, a stop valve B, an electromagnetic valve A, an electromagnetic valve B, a fan A, a compressor, a flow dividing pipe and a flow collecting pipe. The kitchen fresh air ventilation, oil smoke purification and air conditioning combined unit has the beneficial effects that fresh air ventilation, oil smoke purification and air conditioning are combined into the whole, the oil purification effect is good, labor and materials are saved, the energy is saved, the environment is protected, and the health care is achieved.