Prime Minister Malcolm Turnbull says he has "every confidence" his leadership will survive to the next federal election as the government sheds "barnacles" and welcomes back Barnaby.

Mr Turnbull is trumpeting Barnaby Joyce's thumping victory in Saturday's New England byelection as evidence there is still strong public support for the Coalition, despite its recent woes.

Mr Joyce is expected to return to Canberra this week after securing a massive 64 per cent of the primary vote in the byelection, which was ordered after the High Court found he was a dual citizen.

Mr Turnbull admitted the government had faced some "tough issues" in 2017 but said Saturday's result was a "big vote of confidence" in the government.