The invention discloses an air guide plate moving mechanism, an air-conditioner air output assembly and an air-conditioner. The air guide plate moving mechanism comprises a transmission rod extending along an axis, a sweeping mechanism used for driving the transmission rod to rotate around the axis, a push-out mechanism used for driving the transmission rod to move along the axis, and a transmission mechanism, wherein the input end of the transmission mechanism is connected with the transmission rod, and the output end of the transmission mechanism is used for being connected with an air guide plate, so that the air guide plate rotates relative to the transmission rod in the rotating process of the transmission rod. According to the air guide plate moving mechanism, the large air guide plate can be used at will, the air supply distance is long, and the air supply range is wide; a motor is arranged in the air-conditioner, and noise is low; the transmission rod can be solid, and both rigidity and strength can be improved greatly; a bending-resistant motor wire is not needed, the cost is reduced, and reliability is high; the connecting portion of a push rod and the air guide plate comprises few structures, so that the appearance can be small and exquisite; and few small bolts are needed, the appearance and strength are ensured, and the reliability and the assembling efficiency are improved.