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Objective: To investigate the effect of anisodamine combining with conventional therapy on the degree of lung injury and inflammatory reaction of patients with acute pulmonary contusion. Methods: A total of 48 patients with acute pulmonary contusion treated in our hospital emergency department from April 2011 to October 2015 were enrolled as the research object and were divided into experimental group and control group by using a method of random number table. Experimental group received anisodamine combining with conventional therapy and control group received conventional therapy. In the process of the treatment, the mechanical ventilation time, hospital stays in intensive care unit and the number of cases developed into acute respiratory distress syndrome and multiple organ dysfunction syndromes of patients in two groups were observed. Oxygenation indexes of patients were respectively calculated on Days 1, 2 and 3 after treatment. The contents of inflammatory mediators in serum were detected on Day 3 after treatment. Results: The mechanical ventilation time and hospital stays in intensive care unit [(9.52 ± 1.41) vs. (14.57 ± 2.51) days] of patients in experimental group were signifi- cantly shorter than those in control group, and the number of cases developed into acute respiratory distress syndrome [1 (4.17%) vs. 9 (37.50%)] and multiple organ dysfunction syndrome [1 (4.17%) vs. 7 (29.17%)] was significantly less than those in control group. Oxygenation indexes (294.52 ± 41.26 vs. 257.63 ± 38.52; 357.74 ± 47.74 vs. 279.87 ± 31.46; 396.71 ± 55.12 vs. 279.87 ± 31.46) of patients were respectively calculated on Days 1, 2 and 3 after treatment, which were significantly higher than those in the control group. On Day 3 after treatment, the contents of serum C-reactive protein [(7.94 ± 1.05) vs. (14.49 ± 2.97) mg/L], tumor necrosis factor a [(264.69 ± 41.58) vs. (417.87 ± 64.51) ng/L], interleukin-6 (IL-6) [(147.72 ± 21.36) vs. (257.68 ± 41.54) ng/L], IL-8 [(93.68 ± 12.52) vs. (145.62 ± 22.65) ng/L], IL-10 [(205.64 ± 31.56) vs. (336.62 ± 51.38) ng/L] and myeloid cells-1 (73.32 ± 10.39 vs. 114.45 ± 18.51) of patients in experimental group were significantly lower than those in the control group. Conclusions: The anisodamine combining with conventional therapy can relieve the degree of lung injury caused by acute pulmonary contusion, improve ventilatory function, lower the incidence of acute respiratory distress syndrome and multiple organ dysfunction syndrome and inhibit the activation of inflammatory reaction and the release of inflammatory mediators.