In 2018，several key links in China's commercial housing market have undergone significant changes.In the construction sector，the new residential construction area increased substantially and the completion decreased substantially.In the investment sector，the growth trend of residential investment in the eastern，central and western regions and various types of cities is obviously differentiated.In the sales sector，the sales area of existing houses has dropped dramatically，the proportion of sales has decreased significantly，and the unit price of residential sales in the whole year is significantly higher than expected.Seventy large and medium-sized cities housing sales price index growth deviation increased.From all aspects of data changes，the real estate regulation abandons the “one-size-fits-all” and adopts the city-based policy，classified guidance mode.This is an important step in the process of building a long-term mechanism and a successful practice of regulating and managing the real estate market.According to the prediction analysis of the model，the core index structure of the housing market in 2019 may be further differentiated.Special attention should be paid to specific cities and indicators of abnormalities，and specific strategies and control plans should be formulated.