Under the background of service value co-creation, customer citizenship behavior in service settings becomes an important source for enterprises to obtain competitive advantage. Previous studies have revealed the importance of customer citizenship behavior in service activities, however, most of them explain the source of customer citizenship behavior based on customer satisfaction in physical product marketing, or study customer citizenship behavior from the perspective of relationship quality in service marketing. There is little research on the antecedent factors and mechanisms of customer citizenship behavior in mass service environment from the perspective of service interaction quality. Based on the theory of positive psychology, this study examines the relationship between different types of service interaction quality (interpersonal interaction and environmental interaction), customer experience quality and citizenship behavior intention in mass service environment, proposes and tests the theoretical model that two types of service interaction quality affect customer citizenship behavior through customer experience quality. In this study, the services of amusement places with group participation and interaction behaviors (including various large and medium-sized cultural theme parks, indoor amusement parks, movie theaters, home parties, etc.) are used as the research background. The sample data of 314 adult customers from 24 public amusement service institutions of different brands are obtained by on-the-spot questionnaire survey. The empirical analysis shows that: First, both interpersonal interaction quality and environmental interaction quality have a positive impact on customer experience quality and customer citizenship behavior intention in mass service environment, but the impact of interpersonal interaction quality is stronger than that of environmental interaction quality. Previous studies have not distinguished the differences in the quality of interpersonal interactions and environmental interactions and explained the specific effects. This study and its results are an extension and deepening of previous studies on the impact of service interaction quality. At the same time, the findings raise practical questions for companies that are increasingly reducing the number of front-line service employees and service contacts in order to reduce labor costs. Second, the study proposes and tests the way that two types of service interaction quality influence customer citizenship behavior through customer experience quality, and verifies that customer experience quality plays a partial mediating role in the influence of interpersonal interaction quality and environmental interaction quality on customer citizenship behavior intention, which is helpful to enrich the path and mechanism research of the customer citizenship behavior in service industry. Third, customer-firm identity is included into the research model as an individual psychological characteristic variable, and it is proposed and confirmed that customer-firm identity plays a complementary moderating role in the influence of customer experience quality on customer citizenship behavior. This result is not noticed in the previous literature research, which is conducive to a better understanding of the formation and change of customer citizenship behavior in the context of service interaction. This study provides new insights for exploring new antecedent factors and paths of customer citizenship behavior in the context of mass service.