Jelly is a Western dessert with a smooth texture and is a great choice for traveling due to its portability. At present, jelly packaging that is easy to consume requires good sealing, otherwise leakage may occur at the sealing and suction nozzle.The MFY-02 sealing tester is used to test the overall sealing of the outer packaging of jelly products. The main process of the experiment, detection methods, and the application scope of the testing instrument are described to verify the packaging sealing of absorbable jelly products. This helps the food industry fundamentally solve problems such as product leakage and deterioration, as well as parameter settings in production.