Previous studies mainly concentrated in the rationalcognitive decisionmaking process，few focused on the emotional issues． In recent years，accompanied by people' s concern about emotional intelligence， group emotional intelligence also aroused the interests of researchers． Through the review of past research，we proposed the conceptual model of group emotional intelligence． We also explore the mechanism of the effects of group emotional intelligence on group decisionmaking behaviors and outcomes with experiment method． The experiment study involved 55 groups，which was designed as a 2 × 2 factorial design． Results show that: ( a) High GAEI groups will show a higher level of GEI in the following interactive process; ( b) High GLEI groups will show a higher level of GROE in the following interactive process; ( c) High GAEI groups tend to take more cooperative behaviors and less competitive behaviors than low GAEI groups; ( d) High GAEI groups will experience higher levels of process satisfaction and cohesion than low GAEI groups． The conclusions offer references for enhancing emotional management capacity and problemsolving abilities of decisionmaking groups．