According to big data definition, the data processing of exploration of oil and gas is obviously a big data application mode. Computing center is designed to meet data processing needs of the company as the main exploration platform of oil and gas exploration cloud. Under the primise of ensuring the sharing computing power and Collaborative work,exploration cloud focus on support of data storage, data management and data applications. Compared with the general public cloud, the Construction of private exploration cloud has its unique mode. The author company combined with own company characteristics and current big data application needs to construct large data private cloud, and it achieved certain results. The support for the main business is obviously effect.