The invention discloses a high-strength tough titanium alloy drill stem material friction welding method. A titanium alloy drill stem comprises ingredients including, by weight, 5%-7% of Al, 2.0%-3.0% of Nb, 0.5%-2.0% of Zr, 0.7%-1.2% of Mo, 0.02%-0.05% of Fe, 0.01%-0.03% of Si and the balance Ti; and the friction welding method of the titanium alloy drill stem using the above compositions includes the steps that (1) a connector is rotated; (2) pressure is applied; (3) friction welding is carried out; and (4) welding seam induction heat treatment is carried out. The high-strength tough titanium alloy drill stem material friction welding method has the beneficial effects that the combination properties obtained after titanium alloy drill stem material friction welding can meet the conditions that the strength of extension is larger than 900 MPa, and the yield strength is larger than 800 MPa; the 10 mm*10 mm longitudinal ballistic work of a welding seam at 21 DEG C can reach higher than 36 J; the welding seam hardness is smaller than 32 HRC; H2S partial pressure can be 5 Mpa, the CO2 partial pressure can be 11 Mpa, the NaCl concentration is 100000 ppmCl, the elemental sulfur shows far higher sulfuretted hydrogen stress corrosion resistance compared with a common API drilling stem when used in the 3 g/L rigor corrosion environment, the drilling stem is the best material for replacing steel in oil and gas exploitation, and the corrosion environment oil field requirement is met.