Tomatoes are including Jat Seyfi Which is very important economically. Also, due to abundant vitamins, Minerals, Nutrition, is of particular importance. Annual significant percentage of post-harvest tomato crop is destroyed. Among the process post-harvest, Proper packaging plays an important role in reducing waste, Improve the quality and sustainability of horticultural products. Cover fruits and vegetables with edible film or coating Reduce the migration of moisture and breathe fresh fruits and Thus maintaining the quality and Prolonging the shelf life of them. General coverage of chitosan and new coverage of Edible coatings are Hexanal That in order to maintain quality, Slow breathing speed and control of dental caries have been used. The present experiment to find the best concentration of chitosan and Hexanal To increase the shelf-life tomato varieties were Izmir. In the first experiment the effect of chitosan treatments With concentrations 0, 0.5, 1 and 2% The shelf-life tomatoes was investigated. After treatment, fruits and keep in storage temperature 10 ° C To evaluate the shelf life, At intervals of 7 days out And indicators such as firmness, cent Weight loss, pH of the extract, Vitamin C, Acid titratable, TSS, Antioxidants And cent decay were evaluated. In a second experiment the effect of the concentration Hexanal0, 1, 2, and 3% A similar experiment was carried shelf-life tomatoes. The third experiment to compare between the best chitosan derived from the first experiment and The best treatment Hexanal obtained from the second test and They were combined with each other. 4 treatment 0 (distilled water), chitosan (0.5%), Hexanal 2%, and the combined application of chitosan 5 /. And Hexanal 2% Similar tests were done before. The third experiment was a split plot design In time In a completely randomized design with three replications. The results of the first experiment showed that chitosan coating, except for soluble solids, organic acid and extract pH and antioxidant, had a significant effect on other indices of measurement. The least weight loss and caries and the highest rigidity in chitosan treatment were 0.5, which had a significant difference with other treatments. Also, the highest content of vitamin C in the treatment of 0.5% chitosan was obtained. The results of the second experiment showed that hexanal treatment, except for the amount of organic acid, soluble solids, extract pH and antioxidant has a significant effect on other measured parameters. The lowest weight loss was observed in 2% hexanal treatment, which had a significant difference with other treatments.The lowest percentage of caries and the highest amount of vitamin C and rigidity in the 2% hexanal treatment were obtained, which showed a significant difference with control treatment.The results of the third experiment showed that the combined coating of chitosan and hexacanth had no significant effect on soluble solids, extract pH, organic acid and vitamin C, but had a significant effect on weight loss, rigidity, caries and antioxidants. keywords: Tomato, Postharvest, Edible Coatings, Chitosan, Hexanal.