The invention relates to a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a
machine shell, at least one cross-flow fan and an
evaporator; the machineshell is provided with an air inlet and an air outlet, two independent air guide plates are arranged at the air outlet, and each air guide plate is configured to be controlled to be pivoted around a rotating shaft of the corresponding air guide plate; the at least one cross-flow fan and the
evaporator are arranged in the
machine shell, the
evaporator is arranged on the at least one cross-flow fanin a covering mode, and comprises a first heat exchange section, a second heat exchange section and a third heat exchange section which are sequentially connected from back to front, and the third heat exchange section is a V-shaped heat exchange section which extends gradually obliquely in the direction opposite to the outer side of the at least one cross-flow fan from the transverse two ends ofthe
machine shell to the middle of the machine shell or a curved
surface heat exchange section which gradually protrudes and extends in a bending mode in the direction towards the outer side. Rotatingshafts of the two air guide plates extend upwards from the two transverse side parts of the machine shell to the middle part of the machine shell correspondingly so as to enable the projection of therotating shafts of the two air guide plates in the
vertical plane perpendicular to the front and back direction to form an inverted V shape which is gradually obliquely upwards from the transverse two ends of the machine shell to the middle of the machine shell.