Population natural change means population's quantity increases or decreases depends on burning and dying, it is the necessary trend to every creatures, and is the key factor to convert the population reproduction kinds and so becomes the basis of population, economy, resource and environment. Some special incidents happen for example, Family Planning strategy, Cultural revolutionary, natural disasters, population natural change has special characteristics .To do some research about this can make us know the processes in Xinjiang and can predict the trend of population, is important to government to take some measures. This article according to the data to research the processes of population and its characteristics in Xinjiang and analyze the reason of it. The death level is one of the measures to judge the Population natural change, is also the result of social factor. But most of the research about it now analyzes the problem just from the quality, it cannot tell the reason, thought of this, this article use some mathematical tools to do some researches about it. And wishes to look for the real reason of the death level process and the relationship between social and economical factors and it. And to give some reference to some departments belongs to government in Xinjiang. |