Abstract: In order to detect the moisture content in tobacco bales quickly,a microwave moisture meter(MW-T) and its relevant detection system were introduced,the performance of MW-T was evaluated with method,and the calibration model of MW-T was established.The results showed that:R² of the developed model was 0.845.The values of C_g and C_gk of MW-T were 1.76 and 1.55,respectively.The way of bale arrangement and bale density had no effect on the moisture content measurement.The average absolute difference between results of MW-T and standard oven method was 0.38%,and the absolute difference of 96.25% of all samples were within±0.75%.