The acceleration performance of civil aircraft engines is crucial for the safety of aircraft go-around scenarios, where the engine’s acceleration capability directly affects the go-around performance. However, after prolonged use, engine performance degrades, significantly impacting its acceleration capability. Based on the verification requirements of CCAR 25.119 for engine acceleration capability, this paper analyzes the widely used Ndot engine acceleration control logic and its degradation principles, and explores the impact of degradation on engine acceleration performance. Through flight test data and engine transient models, this paper compares the acceleration time differences between new engines and fully degraded engines under different altitudes and bleed configurations, and proposes two analysis methods for engine degradation factors to support compliance verification under CCAR 25.119. The research results show that the impact of degradation on engine acceleration performance is mainly reflected in the later stages of acceleration, with the acceleration time of fully degraded engines increasing by 2–18% compared to new engines. This study provides a theoretical basis and practical guidance for the airworthiness verification of engine acceleration performance, enhancing the safety of civil aircraft engines in go-around scenarios, and holds significant engineering application value.