Abstract:With the development of science and technology, What we need in Cyber-Physical System(CPS) have became more and more complicated。Because the system seem more vast 、more sensors,and need to be more intelligent , the data and information be collectted, stored, processed also need even more. So big data were used to rapidly processing and storage for huge amounts of data in the CPS.However, there are many differences between big data and CPS. The combination of these two systems have different with general systems。Such as time and space model , data flow, modeling and so on.The paper will systematically elaborate the challenges and of the CPS besed on big data be faced and illustrate the characteristics of its modeling demand.