According to the principles and characteristics of drying and cross-flow belt drying machine, the double cross-flow drying test bed was designed. The test bed mainly consists of the upper circulatory system and the lower circulatory system, and every system can be operated independently with cross-flow wind speed of 0~10m/s, temperature range of 30~150℃, humidity range of 0~100%, maximum thickness of 600mm etc. The system can achieve automatic moisture exhaust , the show of energy consumption, all parameters display and record function etc. By the drying experiment of red peppers in the test bed, the effects of pre-drying temperature, post-drying temperature, thickness of red peppers on the impact of energy consumption were investigated. Furthermore the dry parameters of minimum consumption were obtained, at pre-drying temperature 70℃(20min dried)+ 60℃(40min dried), post-drying temperature 55℃, thickness of red peppers 14cm.