Abstract: Based on the analysis of classical existing project management maturity models,(considering) the characteristics of Shenzhou spaceship programme and its related organization(environments),this paper proposes the Shenzhou spaceship project management maturity model(SZ-PMMM).This model includes two sub-models i.e.the enterprise-level organizationand(project-)level organization.The key areas such as "culture" are introduced into the SZ-PMMM,(promoting) the conceptual meanings of project management maturity practically.