The invention discloses a heat pump mounting box for a heat pump clothes dryer or a heat pump washing-drying-integrated machine and the heat pump clothes dryer or the heat pump washing-drying-integrated machine. The heat pump mounting box comprises a base, an air channel guide plate and a soft flock filter screen component, wherein the base is provided with an air suction port and an evaporator-condenser mounting cavity; the air channel guide plate is mounted on the base, the air channel guide plate and the base define an air guide channel, and the air guide channel is provided with a drying air inlet communicated with the air suction port and a drying air outlet communicated with the evaporator-condenser mounting cavity; the soft flock filter screen component is mounted on at least one of the base and the air channel guide plate in a drawable manner and located at the drying air outlet. The heat pump mounting box has the advantages that the heat pump mounting box is good in connection airtightness and easy to clean, and accordingly air quantity loss and soft flock accumulation cannot occur easily.