With “zhenghong 505” as the testing material，two-factor randomized block design was used，and three nitrogen fertilizer levels(normal nitrogen application，20% reduction of nitrogen，40% reduction of nitrogen)，three mulching patterns(plastic film mulching，straw mulching and no mulching)and CK(no nitrogen and no mulching)were set up to study the influence of nitrogen level and mulching pattern on soil water content，soil total nitrogen content，dry matter accumulation，nitrogen uptake，translocation and distribution，yield of maize. The results showed that:(1)Comparing with CK and 40% reduction of nitrogen，the topsoil moisture and total nitrogen content of mulched treatment and the higher nitrogen levels treatment were higher；(2)Comparing with 40% reduction of nitrogen，the average plant height，stem diameter，leaf area and dry weight of the higher nitrogen levels treatment were increased；mulched under normal nitrogen application and 20% reduction of nitrogen were also higher than no mulching treatment，especially in plastic film mulching；(3)The higher nitrogen levels were helpful for nitrogen accumulation and translocation in maize，plastic film mulching under 20% reduction of nitrogen and mulched under normal nitrogen application improved total nitrogen accumulation of grain and plant，increased nitrogen nutrient transportation from stem and leaf to grain，and then enhanced nitrogen harvest index，nitrogen partial productivity，and agronomic nitrogen use efficiency；(4)The yield of maize increased with nitrogen levels，but the increase rate was progressively lower；plastic film mulching treatment had the significant effects on yield，straw mulching under 40% reduction of nitrogen could improve yield to a certain extent；plastic film mulching under 40% reduction of nitrogen could increase higher yield than no mulching under normal nitrogen application. All the results showed that，plastic film mulching under 20% reduction of nitrogen had the possibility to increase yield of maize and reduce nitrogen fertilization simultaneity.