Embodiments of the present invention provide a temperature compensation method and apparatus for a received signal strength indicator. The apparatus comprises a temperature sensor configured to measure a current temperature; and a digital compensation module configured to select a temperature compensation coefficient from prestored temperature compensation coefficients corresponding to a normal temperature, a low temperature and a high temperature according to the current temperature, and perform temperature compensation on output signals of the RSSI according to the selected temperature compensation coefficient. With the method and apparatus of the embodiments of the present invention, the accurate power values of the input signals of the RSSI under any temperatures can be obtained by measuring the characteristics of the RSSI under the predefined three temperatures, and using an interpolation method to compensate for the temperature characteristics of the RSSI. In comparison with the relevant art, the size of the storage is decreased and the accuracy of temperature compensation is improved.