Australia witnessed once again in 2018 an intra-Party political “coup” in which Prime Minister Tony Abbot was ousted by its own Party. Obviously，the “coupe” is the aftermath of a combination of factors，among which Abbot’s reforms of Australian welfare system，including medicare and education，which had generated nationwide dissatisfaction，were on the top list. Much worse，this situation had been markedly exacerbated by such unpleasant data as the rapid decline of Australian economy，the rise of unemployment rate and the widening gap between the rich and the poor，which might be attributable to global economic downturn in general and Australian imbalanced economic structure in particular. As a result，the National Party lost confidence in Abbot and wished to save the forthcoming general election by replacing him with a more popular politician. The motivations behind this “coup” mainly arising from domestic politics mean significant impacts on Australian internal affairs and its general election，rather than its foreign policy. As its largest trading partner and the most energetic economy in the world，China is enjoying increasing influence on Australia and their economic interdependence is ever-growing，which constitute the groundwork for their strategic partnership and ensure a stable Sino-Australian relationship void of radical changes resulting from the replacement of governments in Australia.