Cross-domain fine-grained sentiment analysis method, system and equipment and storage medium

The invention provides a cross-domain fine-grained sentiment analysis method, system and device and a storage medium, and relates to the technical field of big data, and the method comprises the steps: extracting a source domain specific attribute data set and a target domain specific attribute data set according to a marked source domain comment data set and an unmarked target domain comment data set; generating domain-independent sentence structure set data according to the marked source domain comment data set and the source domain specific attribute data set; according to the field-independent sentence structure set data, combining with a pre-training language model to generate a target field comment data set with labels; optimizing the pre-training language model according to the unlabeled target domain comment data set and the labeled target domain comment data set to obtain a fine-grained sentiment analysis model; and performing fine-grained sentiment analysis on the specific attribute data set of the