"We are excited to see that the 737 family will play a significant role in Air China's continued success," said Ihssane Mounir, Boeing's vice president of sales and marketing for Northeast Asia.
Boeing said the Air China orders will only be added to its official log once the details are finalized.
As of December 16, Boeing had net orders of commercial aircraft in 2014 of 1,317 planes, just shy of the 1,355 for 2013.
Boeing shares rose 0.4 percent in pre-market trade to USD 126.78.