The influence of the pretreatment with NaOH on the property of waste paper fiber foamed material was researched by making foam cushioning packaging material with pre-treated waste paper fibers using NaOH solution. The experiment showed the foaming rate, density and buffer performance of foam cushioning material of pre-treated waste paper fibers improved compared with untreated samples. The effect of consumption of NaOH on the performance of waste paper fiber foamed material was more notable than that of time and temperature. Through the test, it was determined that the best condition for the pre-treating of foam cushioning packaging material of waste paper fibers was the mass fraction of NaOH relative to 2% dry pulp, at the temperature of 60 ℃ and with the time of 60 min.