The invention discloses a powder raw material equal-weight packaging machine. A plurality of first conveying rollers are installed on a machine frame. A roller shaft of each first conveying roller is fixedly provided with a chain wheel. A first chain is tensioned on the chain wheels. A rotating shaft of a left motor and the roller shaft of one first conveying roller are fixed together. A third conveying roller is installed in the middle of the machine frame. A friction belt is located on the lower portion of the third conveying roller and makes contact with the third conveying roller. The friction belt is tensioned on a driving belt wheel and a driven belt wheel. The driving belt wheel and the driven belt wheel are installed on a friction belt support. A rotating shaft of a friction belt motor and the driving belt wheel are fixed together. The third conveying roller is located between the first conveying rollers and second conveying rollers. According to the powder raw material equal-weight packaging machine, automatic weighing can be achieved to enable powder materials in raw material packaging barrels to have the equal weigh, meanwhile, the packaging efficiency is improved, the labor intensity of workers is lowered, dust flying is avoided when the powder raw materials are packaged, and it is ensured that the production environment in a packaging workshop is free of dust pollution.