The invention relates to a method of controlling contents of nitrate and nitrite in tobaccos reconstituted in a papermaking method, belonging to the technical field of reconstituting tobaccos in the papermaking method. The method is an improvement, and the improved points include that a, an electrodialysis desalination procedure is added between a procedure for solid-liquid separation and extraction of raw materials of tobaccos and a procedure for extract concentration and coating preparation; b, the electrodialysis procedure comprises pretreatment and electrodialysis desalination of extract of the raw materials of the tobaccos; c, for the electrodialysis desalination, the voltage is set as 0.4-2.0V for each pair of ion exchange films, the flow phase in a concentrated chamber is deionized water or tap water, the quantity relative ratio of flow phases in a dilute chamber and the concentrated chamber is 3:1 to 1:3, the flow ratio is 3:1 to 1:3, and the initial material concentration in the dilute chamber is less than or equal to 20 percent; and d, control of degrees of nitrate and nitrite removal: the removal of nitrate and nitrite is controlled according to a correlation curve of the decrease rate of conductance after material desalination in the dilute chamber and the amount of the removed nitrate and nitrite. The method has the advantages that the rate of nitrate and nitrite removal is high, material losses are low, the contents of nitrate and nitrite can be controlled conveniently, the cost is low, and the application value is high.