File arrival scanning optimization method for polling mechanism

The invention discloses a file arrival scanning optimization method for a polling mechanism. The method comprises the steps that a scanning program is started; at least one hidden folder is created; atarget folder is provided; when a target file is completely written into the target folder, a unique identifier is created in a hidden folder or first data is written into the hidden folder, and theunique identifier or the first data corresponds to the target file; a polling period of a scanning program is shortened, the frequency of scanning the hidden folder is increased, and the hidden folderis scanned; and when the scanning program scans that the hidden folder has the unique identifier or the first data, a target file corresponding to the unique identifier or the first data is extractedfrom the target folder. Only the hidden folder is scanned in the scanning process, the problem that extracted files are incomplete is avoided, and meanwhile the problem that the performance of the files accumulated in the targe