This paper sets a public and private mixed oligopoly model to discuss the problem of the privatization strategies of the public enterprise with statutory surplus policy and gets the following results: 1. Under the conduction of full public and optimal of statutory surplus policy, the profits of public enterprise would large then the surplus fully turn to the treasury, but the Government is still prefer the fully-turn policy. 2. With statutory surplus policy hold, the public enterprise should be partially rather than the fully privatized. 3. To a large government objective, public enterprise should be partially privatized strategies rather than remain full public one.