The drying preparation technology of probiotic microcapsules is the key to ensure the stability of probiotics during long-term storage. In order to objectively evaluate the drying effect of different drying techniques on probiotic microcapsules. In this paper， the applications of spray drying (B1)， vacuum freeze drying (B2)， fluidized bed drying (B3) and microwave vacuum freeze drying (B4) 4 in probiotic microcapsule drying were analyzed. The multi-process grading evaluation index system of probiotic microcapsule drying technology was constructed. Based on the queuing theory， the sequence grades and weights of water characteristics， apparent characteristics， structural characteristics， chemical characteristics， biological characteristics and evaluation factors were determined. At the same time， the cloud evaluation model of probiotic microcapsule drying technology was constructed by introducing the golden section method and cloud generator principle， and the drying effects of four drying methods on probiotic microcapsules were quantitatively evaluated. The results showed that the comprehensive evaluation of the four drying techniques were ZB1 (0.4624， 0.0674， 0.0088)， ZB2 (0.5810， 0.0591， 0.0106)， ZB3 (0.6772， 0.0595， 0.0111) and ZB4 (0.7635， 0.0582， 0.0119)， respectively. The comprehensive order of drying performance of probiotic microcapsules is B4 > B3 > B2 > B1. The research method and conclusion can provide theoretical support and useful reference for enriching and perfecting the drying technology of probiotic microcapsules.