The effects of hot air temperature on the drying properties of biomass brick during heat treatment were examined. Biomass brick was dried for 156 h at 30 °C to 80 °C and 50% relative humidity. The results showed that the moisture content and density of the brick during heat treatment were affected greatly by the hot air temperature. The moisture content was affected remarkably by the drying time. Drying shrinkage extents were affected noticeably by the drying time and air temperature. The moisture content and density after drying were decreased with increased time. The compression strength increased with the increased air temperature from 30 °C to 70 °C.