The shortage of CO₂ is one of the important factors affecting vegetables production in the greenhouse or shed.There are many methods of artificial adding CO₂ into the greenhouse or shed,but there are a lot of defects.On the basic of the actual situation of the greenhiuse or shed,a new type of chemical preparation of the high efficient solid gasfertilizer has been manufactured.The experimental results show that solid gasfertilizer enables vegerables to increase production by 25%,input/output value ratio is about 1∶6,it has peculiarity of social benefits of nonpollution,and it had a favourable reception of peasants.