Communication problem between groups is an important problem which must be taken into account in the research of Group Decision Support System (GDSS).At present,the implementation of group communication is mainly using universal GroupWare product.But because the coordinate communication of the GroupWare product is slow,not flexible and not convenient for system integration,it's not fit for the coordinate communication of emergency GDSS.In order to find a way to accelerate the speed of the coordinate communication of emergency GDSS,the authors study a kind of combination GDSS network communication structure,and then develop a new protocol based on TCP/IP protocol-GDSS communication protocol (GDSSTP),after analyzing the GDSS coordinate communication function.At the same time,the authors give out a solution to process GDSS network concurrent request problem.The implementation of GDSS communication component with OOP (object-oriented programming) is also described.