This research was based on data from research on intermittent drying of paddy rice published by Chen (1995). The drying curve of every treatment showed that the moisture ratio (MR) is exponentially related to drying time. In order for tempering time to be treated as a variable in the thin-layer drying equation, this paper introduced a simplified equation: Cycle=a+b/MR where a and b are linearly related to drying temperature, while the intercept and the slope of the linear equation are related to tempering time. The predicted value from this equation fitted the experimental data well.