communication　problem　between　Groups　is　an　important　problem　which　must　betaken　into　account　in　the　research　of　Group　decision　support　system(GDSS).　Al　first,　we　study　a　kind　of　combination　GDSS　network　communication　structure,then　develop　a　new　protocol　base　on　TCP/IP　protocol-GDSS　communication　protocol　GDSSTP,　after　analyse　GDSS　coordinate　communication　function.　At　the　same　time,　we　give　out　solution　to　process　GDSS　network　concurrent　request　problem,　this　method　has　been　employed　in　earthquake　emergency　system.