Abstract: Though the reform on the marketization of public security service has shown some positive effect to resolve the problem of supply and demand,there are still heated arguments on its rationality.This paper,from perspective of economics,explores into the causes of the marketization of public security service through empirical analysis.It is drawn that urbanization,budgetary deficits as well as the development of the second and third industries,all give high pressure to public security,and that marketization is a sensible choice at present and in the future.

Key words: public security service, marketization