The problem of emplacement mechanism and space of tremendous amounts of granitoid plu-tons in the continental crust has long been disputed. More than ten mechanisms have been proposed, but all of them can hardly solve the space problem, so are disputed. Recently, it has been recognized that emplacement of plutons and their space making are a multiple mechanism consisting of many mechanisms. This is a new subject which needs to be studied further. This paper discusses the multipe mechanism on the basis of three basic mechanism elements, i. e. : forceful expansion, tectonic extension and magmatic swallowing. A triangle diagram is designed to describe them, and some case studies are given.