Based on the practice in power systems， a design of architecture of a data sharing platform is proposed. The data sharing platform is used for providing uniform interfaces for data acquisition and ensures success of data acquisition no matter where the data is， what platform the data is on and what application the data is generated for. The data sharing platform is composed of a logical interface layer， an interface implementation layer and a data reading layer. The logical interface layer provides a set of interfaces for data acquisition. The data sharing platform is written in Java language and exchanges data with other systems based on common information model（CIM） defined by IEC 61970 and IEC 61968 standards. The platform is characterized by platform independence， compliance with international standards， and strong expansibility.