Abstract: Based on the classical Grounded Theory, the conceptual connotation of top management team boundary-spanning leadership is constructed by using 22 biographies which related to the local top management teams with more than 5 million words and the other 6 in-depth interviews manuscripts for local top management teams in Southwest China with more than 60,000 words. The study inductively refines 5 conceptual structure dimensions, including foresight for boundary-spanning, inspiration for boundary-spanning, decisiveness for boundary-spanning, integration for boundary-spanning, resilience for boundary-spanning. We further proposed the FI-DI-R conceptual model of TMTBSL with the triple structure logic of "Noumenon-Process-Objective" (NPO). In general, this study provides a theoretical basis for systematic and quantitative research on TMTBSL and its mechanisms.