The invention relates to an arid and semiarid area dustfall sampling device, comprising a fixture, a dustfall barrel mounted on the fixture, and a friendly bird excrement preventer mounted on the dustfall barrel; the bottom end of the friendly bird excrement preventer is fixedly connected with the top end of the dustfall barrel, and a first strainer and a second strainer are disposed in the dustfall barrel with the first strainer positioned above the second strainer. The arid and semiarid area dustfall sampling device has the advantages of simple structure, good sampling convenience and the like and is suited to scientific research and atmospheric dustfall monitoring for arid and semiarid areas under various conditions, and reasonable arrangement provides a rest for birds to stand on and also prevents bird excrement from falling into the dustfall barrel; the double strainers are used to filter insects and larger-size plant residue, improving purity of collected dustfall material; the device also has the function of decreasing vortexes to avoid secondary dust rise, inhibiting escape of dustfall and improving dustfall collecting efficiency and purity.