The utility model discloses an earthing device on sealed package bag, it includes terminal and rubber sheath, the upper end processing of terminal has last external screw thread, and lower extreme processing has lower external screw thread, and the middle part of terminal is provided with thin disc structure, the thin structural hexagon prism that is provided with of disc, the rubber sheath includes central cylinder, and the inside processing of central cylinder has the ring channel, is provided with the toper thin slice in the peripheral bottom of central cylinder, the ring channel matches to merge with thin disc structure and seals up solidification through the vulcanization, the terminal adopts the conductive metal material to make. This earthing device electric conductivity is good, and sealed reliable, joint strength is big moreover, can be firm install on the sealed package bag long service life, safe and reliable.