Elevating clothes-airing rack

The utility model provides a lifting and lowering airer. The utility model is characterized in that two double trough wheels which are coaxial with a big single trough wheel can rotate through stretching a rope wound on the big single trough wheel; the rotation of the two double trough wheels makes four ropes which are wound on the two double trough wheels wind the two double trough wheels tightly; thus, a rectangular airer which is stretched by the four ropes rises can be lifted. Through stretching a rope which is fixed on a retaining pin, the retaining pin can be disconnected from wheel teeth of a ratchet wheel which is coaxial with the big single trough wheel, and the airer can fall because of the self weight.