In today's consumer market, product packaging has gone far beyond its basic functions of protecting goods and promoting sales by becoming a bridge for emotional communication between brands and consumers. The theory of emotional sustainable design, as a design concept that emphasizes emotional connection, long-term memory, and brand loyalty, provides a new perspective and idea for packaging design. Starting with an overview of the theory of emotional sustainable design and exploring its application value in packaging design, by combining the three-level theory of emotional design, the expression strategies of emotional sustainable design concepts in packaging design were analyzed with the focuses on shared memory, full interaction, continuous narration, expansion of product cultural connotations, commitment fulfillment, and the use of "traces". It is believed that applying the concept of emotional sustainability in packaging design, strengthening the emotional characteristics of product packaging, enhancing the emotional relationship between consumers and packaging, making packaging design a carrier for conveying brand concepts, values, or shared memories of consumers, helps to enhance product added value, increase customer loyalty, and promote the long-term development of the brand.