The invention relates to the technical fields of rebuilding and yield increasing of a low pressure gas well of a gas field and reservoir protection, and specifically relates to a degradable temporaryblocking material for well killing of a low pressure gas well and a preparation method thereof. The degradable temporary blocking material comprises following components in percentage by weight: 45 to65% of a main agent, 15 to 25% of an auxiliary agent, 5 to 10% of a crosslinking agent, 5 to 10% of a degradation promoter, 4 to 6% of an antioxidant, 4 to 6% of a curing agent, and 2 to 4% of an initiator. The provided degradable temporary blocking material can be used to block a low pressure gas well and applied to well killing of the low pressure gas well, and the damage to the low pressure gas well is little. In the cracks and bottom of a low pressure gas well, the degradable temporary blocking material can form a well killing block having the characteristics of high strength, high friction resistance, strong blocking performance, and low permeability through combined bridges and self bonding. The gas generated from the bottom of the low pressure gas well is prevented, the risk of well control during the operation process is reduced, after a corresponding shaft treatment is finished in the low pressure gas well, the degradable temporary blocking material slowly degrades, the permeability of the reservoir is recovered, and the yield of the gas reservoir is improved.