How the regional economy resists external shocks and redevelops is a research hotspot in economic geography in recent years. Taking industrial cluster as the starting point, this paper criticizes the existing regional resilience theory based on the evolutionary economic geography, and proposes a Technology-Relation-Market trinity understanding framework which is applicable to understand the cluster resilience. Taking the D oil drilling equipment cluster in S province as a case, the process of resisting and re-development of the cluster after two external shocks was scrutinized. Through interviews with government departments, key enterprises, and analysis of various texts, it is found that cluster resilience is expressed through three ways: Technological innovation, relational governance, and market diversification. The conclusion challenges the regional resilience theory based on the evolutionary economic geography which emphasizes external technological innovation. It believes that internal technological innovation is also an important source of regional resilience. What is more, relational governance and market diversification are two other important dimensions to regional resilience.