The present invention discloses a method and a device for avoiding Beidou differential location data leakage. The method comprises the following steps of: the step 1, determining the quantity of location terminals; the step 2, making identity recognition cards, and writing data into each identity recognition card, wherein each identity recognition card corresponds to one location terminal; the step 3, putting the identity recognition cards into slot of the corresponding location terminals; the step 4, verifying whether the read data is accurate; and the step 5, generating Beidou differential location data through a location base station, a location satellite and a normally operating location terminal. The system comprises a location base station, a location satellite, a service terminal, acard sending device, a plurality of identity recognition cards and a plurality of location terminals. The method and the device for avoiding Beidou differential location data leakage effectively separate installation personnel from configuration information to avoid configuration information leakage caused by the installation personnel's purpose or the installation personnel's faults, effectivelyprotect location data safety and avoid generation of the problem of the Beidou differential location data leakage.