The $^3$H+$^3$He cluster structure in $^6$Li was investigated by the $^3$H($alpha$,$^3$H $^3$He)n kinematically complete experiment at the incident energy $E_alpha$ = 67.2 MeV. We have observed two resonances at $E_x^*$ = 21.30 and 21.90 MeV which are consistent with the $^3$He($^3$H, $gamma$)$^6$Li analysis in the Ajzenberg-Selove compilation. Our data are compared with the previous experimental data and the RGM and CSRGM calculations.