Magnesite isolated gate material, and magnesite isolated gate upright post and production method thereof

The invention provides a magnesite isolated gate material with high strength, toughness and weather resistance, and a magnesite isolated gate upright post and a production method thereof. The magnesite isolated gate material comprises the following components in percentage by weight: 45 to 55 percent of magnesia, 23 to 28 percent of magnesium chloride, 4 to 8 percent of coal powder, 23 to 28 percent of water, 0.5 percent of foaming agent and 1 to 1.5 percent of modifier. The modifier, the foaming agent and high-purity halogen liquid are added into the magnesite isolated gate material, so that the magnesite isolated gate material has higher strength, toughness and weather resistance and can meet the requirement of outdoor long-term stable operation.