As the most basic method for system or project requirement confirmation, traceability is usually to trace the requirements to the superior requirements, or to the design requirements. It is a major challenge for aero-engine manufacturers to effectively trace and manage the safety requirements of aero-engine, and improve the authority’s trust in engine safety assessment. This paper studies the management process of engine safety requirements, and analyzes the traceability activities involved in requirements development including requirement capture, requirement analysis, requirement confirmation, requirement allocation and requirement verification. The traceability characteristics and manifestations of different engine development stages were studied including requirement analysis and definition stage, conceptual design stage, preliminary design stage, detailed design stage, verification and certification stage, and requirements and attention for traceability were proposed in the certification activities. We hope to provide support for engine of safety working management and implementation of safety requirements in China.