The invention discloses a honeycomb type low-temperature flue gas denitrification catalystpowder and a preparing method thereof.The honeycomb type low-temperature flue gas denitrification catalyst powder is prepared from, by mass, 3.0-5.0 parts of vanadium oxide, 3.5-5.1 parts of molybdenum oxide, 0.1-1.0 part of tungsten oxide, 0.1-3.0 parts of manganese oxide, 0.01-0.1 part of phosphorus oxide, 0.01-0.05 part of boric oxide, 0.1-1.0 part of copper oxide and 84.75-92.68 parts of titanium dioxide.The preparing method comprises the steps that firstly, an active component solution is prepared; secondly, a catalyst is loaded with an impregnation method; thirdly, the consistent honeycomb type catalyst is prepared through extruding forming.According to the honeycomb type low-temperature flue gas denitrification catalyst powder and the preparing method thereof, the activity and catalytic capability of the low-temperature flue gas denitrification catalyst are effectively improved, the denitrification efficiency can reach 38% at 120 DEG C and reaches 95.1% at 210 DEG C, high industrial application value is achieved, and the honeycomb type low-temperature flue gas denitrification catalyst can be widely applied to NH3 selective catalytic reaction of nitric oxide in flue gas.