With the two-shaft horizontal total mixed ration mixer, the authors studied experimental methods for evaluating indexes of processing quality of total mixed ration. Based on acquired data, quality-evaluating indexes of total mixed ration were determined as uniformity and particle distribution. Experiment results show that sorghum is one simple, reasonable and practical tracer, meanwhile, salt content measure is stable and accurate. The experiment indicates that vibrating screen could be utilized in determination of particle distribution. The most suitable evaluation method is to use a set of punched sieves formed by sieve pores of Ф19 mm, Ф8 mm, Ф5 mm and underpan to screen out 100 g sample by vibrating for five minutes, then to analyze material ratio over the sieve for particle evaluation.