Denitration catalyst sulfur-resistant regeneration agent and denitration catalyst regeneration method

The invention discloses a denitration catalyst sulfur-resistant regeneration agent and a denitration catalyst regeneration method. The denitration catalyst sulfur-resistant regeneration agent comprises a pre-cleaning agent and an active loading agent, wherein the pre-cleaning agent is prepared from the following components in percentage by mass: 1 to 5 percent of citric acid, 0.2 to 2 percent of triethanolamine, 0.05 to 5 percent of sulfuric acid, 0.1 to 2 percent of alkyl glycoside, 0.3 to 4 percent of dodecyl trimethyl ammonium bromide and the balance of water; the active loading agent comprises the following components in percentage by mass: 0.1-2% of cerous nitrate, 0.2-2% of ammonium molybdate, 3-5% of vanadium salt, 1-5% of tungsten salt, 0.1-2% of sulfuric acid, 0.1-1% of citric acid, 0.1-0.3% of a JFC penetrant and the balance of water. The anti-sulfur regeneration agent for the denitration catalyst can well recover the specific surface area of the catalyst, well eliminate ash deposition and sulfur su