In　order　to　enhance　the　performance　of　interference　location　for　satellite　systems　based　on　TDOA　Measuremen,　a　new　TDOA　parameter　estimation　method　based　on　Secondary　correlation　TDOA　estimation,　combined　with　improved　threshold　wavelet　de-noising,　is　presented.　By　the　use　of　the　characteristic　of　the　wavelet　de-noising,　The　algorithm　overcomes　the　limitations　of　the　Hilbert　second　correlation　method　which　requires　a　priori　knowledge　of　the　signal　and　noise,　able　to　accurately　estimate　the　TDOA　parameters　of　the　signal　in　the　low　SNR　environment　and　effectively　improve　the　performance　of　satellite　interference　location.　The　simulation　results　illustrate　the　reliability　and　effectiveness　of　this　new　TDOA　estimation　method　for　satellite　interference　localization.