A method for enforcing context model based Service-Oriented Architecture (SOA) policies is provided, which includes: gathering instance documents related to policy enforcement according to a business requirement; generating an instantiated context model using the gathered instance documents; generating a policy set to be enforced according to the gathered instance documents; determining an enforcement sequence of policies in the policy set; and applying the policies to the instantiated context model according to the enforcement sequence. The method for enforcing context model based SOA policies may flexibly gather the instance documents according to scenarios and purposes of the policy enforcement to define the policy scope, such as project, application, service, etc., and may be applied to various types of the SOA policies. In addition, a policy engine for enforcing context model based SOA policies is provided.