MASCOT spring energy storage seal ring is a spring driven pressure auxiliary sealing device with PTFE jacket, in which a corrosion-resistant metal energy storage spring is specially equipped. When the minshuo seal ring is installed in the seal groove, the spring is pressed to make the jacket lip close to the seal groove, thus forming a seal. The spring provides permanent elastic force for the sealing jacket, and makes up for material wear and offset or eccentricity of matching parts. The system pressure also assists in the seal jacket energy storage. Through the spring force assisted by the system pressure, the effective sealing can be realized no matter in high or low pressure.