The patent application discloses a preserving method of condiments. The method comprises the following steps: S1, arranging a tear bar connected to a loading bag above the loading bag; S2, pre-pressing a tear line aligned to a slide rail between the tear bar and the loading bag, and forming a tear port in one end of the tear line; S3, arranging an extrusion net between the tear bar and the loading bag, and linking the extrusion net with a zip-fastener; and S4, mounting extrusion rods linked with the extrusion net and an air bag between the extrusion rods for absorbing or releasing air at the bottom end of the extrusion net. According to the method disclosed by the patent application, the condiments do not drift away if being opened or closed.