Propagation of terahertz wave in sand and dust environment is investigated in this paper. The effects of sand and dust are included to the atmospherical attenuation based on the International Telecommunication Union(ITU) standard. The atmospherical attenuation is calculated by using the atmospheric Millimeter-wave Propagation Model(MPM). The attenuation due to sand and dust is calculated according to the Mie’s theory. The total attenuation is predicted by summing up the atmospherical attenuation and the particle attenuation. The calculation results can provide reference for terahertz applications in sand and dust environment, as well as other particulate environments for assessment of terahertz wave propagation.