This paper describes the significance of exploiting and developing renewable energy under the current circumstance of fossil energy shortage. The paper introduces the working principle and the overall structure of the circular mold briquetting machine. In the transmission and feeding mechanism, the “one shaft” structure is used. The “Double-roller” is symmetrically arranged in the compression chamber, and the combination circular mold is adopted. It is shown in the structural analysis that the briquetting machine is of simple structure, high work efficiency, and low cost. Moreover, it can be conveniently repaired and replaced. The structural analysis provides significant theoretical basis for the optimal design of the briquetting machine.