The invention relates to the technical field of air conditioners, in particular to a hanging type air conditioner indoor unit. The problem that in the prior art, an air purifier or large fresh air system is adopted to improve indoor air quality, and the effect is not ideal is solved. The hanging type air conditioner indoor unit comprises a shell, an air returning opening, an air outlet and a purifying module; the purifying module comprises a shell, an air inlet system and an exhaust system, the air inlet system comprises a dual-way air pipe, a first air inlet and outlet, a heat exchanger, an induced draft fan and an outdoor fresh air outlet pipe, the exhaust system comprises an indoor air inlet, an exhaust fan, a heat exchanger, a first air inlet and outlet and a dual-way air pipe; the purifying module can be mounted on one side of a shell of the hanging type air conditioner indoor unit. Through the arrangement manner that the purifying module can be mounted on one side of the shell ofthe hanging type air conditioner indoor unit, the hanging type air conditioner indoor unit can reasonably and effectively purify indoor air, and meanwhile, the oxygen content of indoor air can be improved.