Disclosed in the present invention are a knowledge-
distillation-based dynamic fusion method,
system and apparatus for missing multi-
modal data. The method comprises: on the basis of a classification network, constructing a plurality of single-
modal teacher models, and respectively preforming training on the classification network by means of each type of single-
modal data to obtain corresponding single-modal teacher models; on the basis of a threshold network and a series of expert networks, constructing a multi-modal dynamic fusion network, wherein the threshold network is used for determining which expert networks are activated and outputting one one-hot vector, the length of the vector is the number of expert networks, the data used by each expert network is a subset of a plurality of modalities for
feature fusion, and the multi-modal dynamic fusion network, on which training performed using data including complete modalities has been completed, is used as a student model; and using the teacher models to perform
distillation training on the student model, and inputting actually acquired multi-
modal data into the multi-modal dynamic fusion network to obtain a category prediction result. The present invention can increase the effective
utilization rate of data and improve the prediction accuracy of multi-modal models.