The utility model discloses a sulfur hexafluoride gas density relay of two compensation components in area, including casing, base, end seat, baden's pipe, demonstration temperature compensating element, control temperature compensating element and a plurality of signal generator as gas density relay, the one end of baden's pipe is connected on the base, the other end passes through the end seat links to each other with control temperature compensating element's one end, signal generator installs on the base or in the casing, gas density relay still include an initiating terminal with control temperature compensating element's the other end is connected, and enlargies the end drive signal generator is so that contact switch -on on the signal generator or the displacement mechanism of amplification that breaks off are worked as the gas density value and is changed, and baden's pipe and temperature compensating element produce the displacement, transmits after this displacement is enlargied through the displacement mechanism of amplification and gives signal generator, makes signal generator send corresponding signal, accomplishes the function of density relay.