[Purpose/significance] Exploring the structural elements and formation mechanisms of digital hoarding be⁃ havior of mobile social media users helps to enrich the theoretical paradigm of information behavior research, and pro⁃ vides theoretical and applied references for analyzing the phenomenon of digital hoarding behavior of mobile social me⁃ dia users. [Method/process] Based on the I-PACE theoretical model framework, this paper analyzed the elements of mobile social media users' digital hoarding behavior from four dimensions of "user-emotion-cognition-behavior" and constructed a model of the mechanism relationship of it. [Result/conclusion] The specific guiding strategies for the be⁃ havior are proposed to provide reference for effectively solving the hoarding problems in the era of digital information.