With nitrobenzene as raw materials, p-aminophenol is obtained by using aluminium reduction in acidic solution. The factors such as reaction temperature, reaction time and acidity are optimized, and the optimum experimental results are achieved through experimental methods. The results showe that the yield of p-aminophenol could reach up to 80.2% under the optimum reaction conditions： 100℃, 10h, n（nitrobenzene）： n （H2S04）=1.0 ： 1.14. Compared with traditional process, this process possesses applied prospects in chemical industry due to its low cost, easy and simple separation, and high yield eoefficieney.