A gateway data exchange system in distributed heterogeneous network is designed and implemented to solve the large conflict problem of data exchange in distributed heterogeneous network. The principle of system gateway data exchange is given, and the LCG tree traversal data is designed. The data exchange identifier is set as the traversal path between the LCG tree’s parent node and the target node. By setting the data exchange rules, the branch expansion of the LCG tree is completed, to make system output in the form of oriented tree. In order to provide strong integration for relational databases, a data exchange model has been designed in this system. The model will be LCG tree traversal path constraints for different kinds of gateway data to enhance system performance. The experimental results show that the designed system has the characteristics of large amount of data exchange, high security and excellent data exchange compatibility.