The relationship between Canada and the United States in 2018 is full twists in the context of the rise of global conservatism ethos. This paper analyzes from three angles：The first is to analyze the views of the general public opinion on the relation between Canada and the United States n 2018，and thus analyze and summarize the fundamentals of this year’s Canada-US relation；The second is to review two major events affecting the relationship between Canada and the US in this year：the signing of the Agreement between the United States of America，the United Mexican States，and Canada（USMCA）and the Huawei incident. Finally，this article summarizes the fact of a challenged Canada-US relation which caused by the rise of global conservatism in recent years. This paper also looks forward to the future trends of the two countries so that we can have more clearly sense and strategy which how China should adopt between the two countries. In the author’s view，the relationship between Canada and the US is impacted by the global conservatism，and there is a tendency for conservative parties and groups in different locations to connect in tandem. Under the impact of global conservatism ethos，the relation between Canada and the US has been torn. How China should precisely position itself between the two countries is a crucial question to be asked，and how to remain its political independence in today’s international situation under the impact of conservatism is a major task for the Canadian politicians.