CHIQL is a new database query language to，satisfy the requests of Chinese users and has the features of naturalness and simplicity，procedural and multi-statement query．AS a main feature，procedurality enable users to use multi-statements to express a query with 11 templates，especially concerning complex one．In term of its implementa-tion，multi-statement optimization iS a special issue in CHIQL．This paper devises a state-ment.merge method to improve the efficiency of CHIQL query and give some qualitative analysis about it．