The invention relates to the technical field of e-commerce, in particular to a multi-merchant user behavior
deep learning analysis method, which comprises the steps of collecting interaction data of each merchant end, calculating a gradient based on a
local learning model, packaging slices and uploading the slices to a cloud end; aggregating gradients, constructing a behavior
relation graph and generating a causal
tensor, and inputting the causal
tensor and the graph domain multi-scale features into a
time sequence embedding model to obtain time embedding; generating commercial tenant high-dimensional pulse vectors through
random projection and binary mapping, and aggregating the commercial tenant high-dimensional pulse vectors into cross-commercial tenant vectors; executing a generative reverse process on the cross-merchant vector according to a
noise strategy to obtain a prediction vector; the prediction vector and time are embedded and mapped into an
energy matrix, an action vector is sampled through
quantum optimization, and the action vector and a cross-merchant vector are input into a
reinforcement learning network to output a recommendation decision; and generating an update gradient according to user clicking and
payment feedback, and returning the update gradient to the merchant end to form a self-calibration
closed loop. According to the method, cross-merchant collaborative recommendation is realized on the premise of not exposing
original data, and
cold start recall and real-time conversion rate are improved.