Abstract: As for Delphi application program visit database,the traditional way is first to create a database in the background,and then through the components of data access page,to connect database,which is called static access database.However,when application program that collects the database may change in time or different functions,the traditional way is impracticable.In light of this condition,this article proposed a method——Dynamic access database.In other words,it is unnecessary to establish a database first in the background,we can generate the database that we need with direct code,and can visits the database at random.