The invention discloses a production method of 2,4-dinitraniline. 2,4-dinitrochlorobenzene and ammonium hydroxide are taken as raw materials; the method comprises steps as follows: bottom water is added to a reaction kettle, heated to 50-70 DEG C, mixed with 2,4-dinitrochlorobenzene and then heated, ammonium hydroxide is dropwise added, the mixture is heated to 90-100 DEG C after addition, the pressure is controlled at 0.05-0.1 MPa, the thermal insulation reaction is performed for 1-3 hours, and 2,4-dinitraniline is obtained through centrifugal filtration. 2,4-dinitraniline is produced with a low-temperature and low-pressure method, the reaction conditions are mild, the production safety risk is low, a high-quality product is obtained through centrifugal filtration after the reaction ends, further purification and separation are not required, and the production cost is low.