The utility model relates to a SNCR (Selective Non Catalytic Reduction) denitration device of flue gas in a glass melting furnace. The device comprises the glass melting furnace (5), wherein a heat storage chamber (1) is connected onto the glass melting furnace (5) and is connected with a melting furnace flue (6). The device is characterized in that a group of heat exchange blocks (2) are connected into the heat storage chamber (1) in a matching manner and used for dividing a cavity body of the heat storage chamber (1) into a group of heat storage channels, wherein a reductive agent spray gun (4) is connected into one heat storage channel. The device has the advantages of being simple in structure, small in volume, convenient to operate, easy to overhaul, good in application effect and relatively low in running cost, and realizes great reduction in emission concentration of nitrous oxides in the flue gas in the glass melting furnace.