The invention relates to a real-time interaction violation detection method,
system and device and a medium. The method comprises the following steps: acquiring an online interaction session original information flow containing a user text sequence, a voice
signal, an image file and an interaction behavior
timestamp; extracting text semantic vectors, voice acoustic features and image visual content description, and integrating to generate an initial
feature vector set; based on the interaction behavior timestamps, constructing an
interaction time sequence diagram by taking the initial vectors as nodes, calculating multi-
modal association weights among the nodes and updating connection edges to obtain a multi-
modal fusion diagram; and inputting the fused graph into a graph neural network, outputting a global graph embedded vector through
message passing and node aggregation, matching a preset violation mode vector
library to calculate a similarity
score, determining a violation type, and generating a
risk assessment conclusion containing the violation type and confidence. According to the method, cross-statement and cross-
modal context violation association is effectively captured, violation judgment accuracy is improved, and an intervention basis is provided for a platform.