目的 为了提高混合办公废纸纤维素酶法的脱墨效果。方法 将纤维素酶用于办公废纸脱墨中，通过对脱墨浆白度和油墨脱出率的分析，归纳出最佳的工艺条件。结果 混合办公废纸纤维素酶法脱墨最佳工艺，平平加OS-15协同纤维素酶Novozyme 476脱墨，表面活性剂最优添加质量分数为0.75%，浆浓度（质量分数）为6%，pH值为8.5，处理温度为55 ℃，处理时间为60 min，酶用量为2 U/g。结论 表面活性剂协同纤维素酶脱墨效果得到明显提高。

The work aims to improve the deinking efficiency of mixed office waste paper cellulase. Cellulase was used in office waste paper deinking. Based on the analysis of deinking pulp whiteness and ink removal rate, the optimum process conditions were concluded. The best process for deinking of mixed office waste paper cellulase was to add the OS-15 with cellulase Novozyme 476 for deinking, the best dosage (mass fraction) of surfactant was 0.75%, the pulp concentration (mass fraction) was 6%, the pH value was 8.5, the processing temperature was 55 ℃, the processing time was 60 min, and the amount of cellulose was 2 U/g. The enzymatic deinking efficiency has been significantly improved with the surfactant added to the cellulose.