With the advent of emerging computing services such as cloud computing and the decline in hardware prices, the unit price per GB of mechanical hard drives has plummeted by 87%, the amount of information on the Internet has shown explosive growth. Furthermore, the scale of data in large enterprises has reached EB level at present. These massive data form subject-oriented, integrated, relatively stable data warehouses which can reflect historical changes. How to process and analyze these data has gradually become the key technology of Big data. This paper will discuss the key technologies of Big data processing and analysis, such as data preprocessing and Big data analysis framework.