Canadian diplomacy has been deeply influenced by its character of “Middle Power”. No matter what changes happen to its political situation，it maintains the desire of seeking independence as well as the habit of following. On one hand，Harper government has changed from a moderate middle diplomatic style to a more active actor，seeking more discourse power by promoting its Arctic strategy and diversification policy of energy export，and meanwhile developing together with other Middle Powers. On the other hand，due to the inextricable attachment relationship with the United States，its diplomacy has always shown a character of following. Actually，during its way of seeking independent diplomacy，Sino-Canada relationship means a lot to Canada. In recent years，economy and energy diplomacy have become the major dynamics for mutual relation，but have also sometimes disturbed or blocked by some negative political factors. In the near future，the trend of “cold politics and warm economy” will still be maintained.