Abstract: Since it is difficult to solve the problem of area parting in function optimization by using mathematics methods, a method of area parting is put forward with restricted genetic algorithm in this paper. A restricted genetic algorithm of area searching, which is based on automatic area parting, has been implemented, and the control strategy of area searching is discussed also. While analyzed theoretically, the algorithm put forward in this paper is global convergence, and is provided with the following characteristics: higher convergence speed, higher stability, better controllability, and being implemented in parallel easily. Finally, some future researching problems are given.