The compression ratio is a very important parameter which influence whether a pellet mill will make good quality pellets or bad quality pellets, at high output or at low output. This article will give out a detailed explanation on what is compression ratio and how compression ratio influence pellet making for a pellet mill. A compression ratio is a dynamic parameter during pellet production for a pellet mill. And for each unique material, the set compression ratio could be different. That is also the reason experience of a pellet mill manufacture matters, the longer time they devote into business, the preciser compression ratio and better total solution could be provided for customer.