Mineral powder briquette machine, coal powder briquette machine and others may cause the deformation problem of materials, and the reasons are usually the insufficiency of materials fed, the insufficient hydraulic pressure, the damaged roll surface, etc. The insufficiency of materials fed may cause the deformation of materials. The feeding speed can be adjusted to add the feeding volume. Insufficient hydraulic pressure may cause incomplete compression of materials. The rotating speed of the engine can be reduced so that to improve the hydraulic pressure of the briquette machine. The damage of roll pressure may reduce the pressure of materials formation, the damaged surface can be fixed or replaced to improve the briquetting performance. When all the factors that influence the briquetting performance meet the criteria, the adhesion agent can be added adequately to improve the briquetting ratio. The volume of adhesion agent is usually controlled in the range of 4% to 8%, sometimes in the range of 2% to 3%. By the way, it also can be experimented firstly to set a suitable ratio.