“TPL”is developed as an international language which is used only in scienti且。 and technological且elds. In this paper, mainly, the grammar of TPL is described. TPL grammar has some features.(1)Unlike natural languages, there are no ambiguities in the grammar.(2)The word order rule is Hexible and everyone can speak the selltences of TPL in his favorite order.(3)TPL can be easily converted into predicate logic, so it is supposed that