The invention discloses a method for realizing circulatory storage of records in single file and positioning, reading and shifting of records. The method comprises the following steps: (1) setting the upper limit value N of storable records of a file; (2) setting M as any positive integer incapable of being exactly divided by N; (3) writing the records in the file and allocating a label A for each record; (4) setting the label method: A=(Apre+1)%M, wherein Apre is the label value of the previous record; and (5) after the number of records in the file reaches the upper limit value, scanning the labels of all the records, and if (A+1)%M=Anext, the position of the record of which the label is Anext is the position for writing in a new record continuously. According to the invention, through the method for allocating labels to the records and impression taking, the records can be circularly added in a single file, and the vernier writing position in the circular file can be simply and conveniently positioned, so that record reading and writing can be well realized and the size of space occupied by the file is effectively controlled.