The invention discloses a security sandbox system supporting the security fusion of multiple data sources, including a data layering module, a multi-tenant isolation module, an audit module, a desensitization module and a lifecycle management module. The security sandbox system is equipped with An audit module, the audit module includes a judgment module, an alarm module and a blocking module, and the judgment module, the alarm module and the blocking module are connected through a control; the invention is safe and reliable, and the safety sandbox system provides a safe The data fusion mechanism enables different companies to import data into the security sandbox, perform data fusion in the security sandbox, and expand the data dimension. The security sandbox will ensure that customer data can flow to each other within the sandbox, but cannot flow out of the system In addition, through the security sandbox, enterprises can safely share data with partners, and no party can unilaterally export and use the data in the sandbox, ensuring data security.