Data version control method

The invention relates to a data version control method. The method builds a control process of a Petri net customer premises network (CPN) simulated data version. The Petri net bank comprises a data version bank and an operator bank. Supporting willing with different colors represents data with different versions. When operators update the data, a triggering source is changed so that the operator bank receives the information of the operators and simulates the forming process of the data version through the different triggering change. The formed latest data version is stored in the latest data version bank; the historical data versions are stored in the historical data version bank, so that the later inquiry is convenient. By triggering the redundancy and combining the change, the redundant data is combined. Problems of concurrence and combination in the updating process of the data versions are effectively solved. The consistency and integrity of the data are guaranteed, and the management level of the hist