As a new type of e-commerce model, live-streaming E-commerce plays an important role in releasing consumption potential, promoting industrial integration, and promoting innovation and entrepreneurship. Based on the technology acceptance model (TAM), the theory of planned behavior (TPB) and the Trust Theory, a structural equation model is established to conduct an empirical study on the consumer behavior of live E-commerce. The research results show that: perceived usefulness, trust, and subjective norm all have significant positive impacts on consumers' usage intention. In addition, perceived ease of use and trust also have significant positive impacts on perceived usefulness.