This paper attempts to extend and define the concept of perlocutionary act on the basis of the connotation of Austin s perlocutionary act,which helps to reconstruct the connotation of speech act.

The perlocutionary act of Austin s trichotomy on speech acts is significantly crucial to understand communication,but has attracted the least attention ever since its formulation.

Based on the perlocutionary act from Austin s speech act theory,the analysis of three different kinds of hearers results in the positive effects and the negative ones on both speakers and hearers in daily language phenomena.

Through the analysis of the nature of perlocution,it can be concluded that perlocution is not a clear-cut act but a process which caused by illocution and involves the participation of both the speaker and the hearer.

In Austin s (1962) tripartite model of Speech Act Theory, perlocution is often neglected or even excluded from the domain of linguistics by most researchers.

This study makes a poetic discourse analysis from a pragmastylistic approach based on the notion of perlocution within the framework of speech act theory.

It first proposes a model of perlocution by considering poetry as a discourse whose effects are produced in the interaction between the poet and the reader.

In these cases, we consider them as perlocutionary act failures.

The response of the polymer melt behavior of orientation for axial vibration of screw in short pipe extrusion die head was studied by the light scattering technology.