Piano automatic accompaniment method for vocal singing

The invention relates to the technical field of piano accompaniment, in particular to a piano automatic accompaniment method for vocal music singing, which comprises the following steps: determining a target vocal music type, calling sample music cases of the same type, and extracting the sample music cases of the same type based on the target vocal music type; sample overall information extraction: extracting pitch, rhythm, speed, author, mode and the like of the piano accompaniment song of the sample music sample; sample segmentation: segmenting the sample music cases into phonetic pattern element structures by taking pitches as units, and acquiring feature data of any group of sample music cases as original phonetic patterns to establish a database; training samples, training the segmented sample music cases, and inputting phonetic type element structures which appear in the sample music cases but do not exist in a database into a receipt library; and training the target vocal music, extracting target voca