In traditional peanut combine harvest, loss rate of peanut in the process of chain rigidity clamping is rather high. Thus, three-belt clamping technology was proposed. Making use of general three-belt flexible clamping cushion to peanut, general three-belt clamping feeding device was developed. Belt type, belt distance, belt speed and so on were determined through bench tests. And according to the field comparative tests to chain rigidity clamping feeding mode, comprehensive evaluation was done on testing index, such as pulling-down peanut drop rate, clamping feeding rate, clamping breaking rate, soil removing rate, straw falling rate, peanut falling rate and so on. The results showed that loss rate of the general three-belt clamping feeding mode was rather low and more suitable for current Chinese peanut harvest situation.