Abstract: This paper purports to explore the individual differences in semantic subjectivity of modern Chinese modal particles. It is concluded that a large variety of linguistic resources are available to express semantic subjectivity. The speaker should choose among such linguistic resources to achieve his communicative goals and the choice is influenced by various objective and subjective factors and discourse functions. Hence an analytical model is advanced here to analyze the semantic subjectivity of modern Chinese modal particles on the basis of linguistic subjectivity, and then the individual differences in semantic subjectivity of modern Chinese modal particles of Thunderstorm is analyzed as a case study.