Vacuum warming insulated device increasing seal length

With an overall solution scheme of the technical scheme, warming performance of a vacuum warming insulated device can be improved. Heat of a seal length part can be transmitted via stainless steel material of seam between a barrel wall (23) and a cover wall (22); warming performance and H/(Phi*D) are in positive correlation; with the same condition of the Phi*D, seal length (H) is larger than seal length of a present warming barrel; the vacuum warming insulated device increasing seal length is suitable for vacuum warming insulated devices, like warming bottles and vacuum heat insulation cookers contained in a warming container; and the vacuum warming insulated device increasing seal length is energy-saving and environment-friendly, thereby possessing obvious economic and social benefits.