As an inherent core attribute of human language, emotional expressivity far transcends mere emotional venting. It constitutes a complex, multi-layered semiotic system that collaboratively builds a bridge for externalizing our inner emotional world through sophisticated linguistic devices, dynamic communicative strategies, and creative stylistic methods. This paper systematically examines how these three types of mechanisms operate in concert to transform private, abstract emotions into perceptible, comprehensible, and resonant signs, while analyzing their core functions and aesthetic value in both interpersonal communication and literary creation.