The invention relates to an epoxy asphalt deck crack repairing agent capable of being cured at normal temperature, which comprises mixture A and B, wherein the mixture A contains the following components in parts by weight: 30-40 parts of 618 bisphenol A epoxy resin, 2-6 parts of CYH-277 reactive epoxy toughener and 3-7 parts of epoxy active diluent; and the mixture B contains the following components in parts by weight: 90-100 parts of 203 modified amine hardener, 1-2 parts of DMP-30 curing accelerator and 1-2 parts of KH-550 organic siloxane coupling agent. After being respectively prepared, the mixtures A and B are respectively stirred and mixed; and after the mixture (1) and the mixture (2) which are uniformly stirred are mixed together in the weight ratio of 3:1, the mixture (1) and the mixture (2) are stirred and mixed to obtain the repairing agent. Because the repairing agent contains the bisphenol A epoxy resin, the repairing agent has super-strong bonding capability and stable performance in the variation range of deck temperature; the repairing agent has good high-temperature flow resistance, compact structure, water tightness, certain deformation resistance and good chemical corrosion resistance; and the comprehensive performance of the repairing agent is obviously better than that of the traditional asphalt crack pouring material.