The invention discloses a process behavior-based platform integrity state information measurement method. The method comprises the following steps of 1, capturing a measurement request of an application layer, and extracting a measurement object from an application; 2, analyzing a running state and an executive parameter of the application, and collecting process behavior information related to the measurement object; 3, according to a behavior characteristic, judging whether a current measurement result is added to a measurement list or not, and collecting the process behavior information related to the measurement object in the measurement list; 4, storing the measurement result in a specific PCR of a trusted platform module through expansion operation, generating a measurement report and sending the measurement report to a log audit mechanism of the application layer; and 5, according to the measurement list, a measurement log and the measurement result stored in the PCR, verifyingand calculating integrity state information of the platform. According to the higher-granularity integrity state information measurement method provided by the invention, the reflected to-be-verifiedand calculated security attribute information of the platform is more accurate, so that the measurement efficiency can be improved.