Abstract: Under the condition of increasing CO2 concentration to 1 200 mg/kg,using the test tomato material CM966,cherry tomatoes Huang Ma milk,the yield,quality and determination of disease analysis aims to provide theory basis for greenhouse tomato to improve yield and quality.Greenhouse conditions and test results showed that CO2 concentration to 1 200 mg/kg increase the average weight,prophase commodities fruit yield,fruit production,soluble solids of CM966 and Huang Ma milk,and had extremely significant difference;the condition of applying CO2 concentration to 1 200 mg/kg effectively inhibited the occurrence of leaf mildew of CM966 and Huang Ma milk.