To explore the effects of suitable water and nitrogen allocations on photosynthetic characteristics and yield of jujube trees with filtration irrigation in arid areas，8 years old jujube trees were used as research objects，and different irrigation quotas (W1:2250 m3/hm²，W2:3000 m3/hm²，W3:3750 m3/hm²) with different nitrogen application rates (N1:240 kg/hm²，N2:300 kg/hm²，N3:360 kg/hm²) were set up.The photosynthesis characteristics (Pn，Tr，Gs，Ci)，leaf chlorophyll content (SPAD)，nitrogen content (N)，water use efficiency (WUE)，nitrogen fertilizer partial productivity and yield of jujube under different configurations were analyzed.The Pn，Tr，Gs and Ci of different water and nitrogen allocation reached significant difference (P<0.05).The results showed that，with the increase of water and nitrogen allocation，Pn，Tr，Gs and SPAD gradually increased.The Ci and N decreased with the increase of irrigation amount.The increase in the amount of nitrogen applied significantly increased the value of Ci and N.Appropriate water and nitrogen configuration was conducive to photosynthetic characteristics，leaf SPAD，nitrogen fertilizer bias growth，water use efficiency，yield components and yield.The W2N2 utilization efficiency was up to 2.54 kg/m3，and the nitrogen fertilizer bias was up to 24.15 kg/kg.The yield component and yield (7246.26 kg/hm²) ranked only second to W3N3.Considering the photosynthesis characteristics，chlorophyll content，nitrogen content，water consumption，yield and nitrogen fertilizer partial productivity of jujube trees from the interaction of water and nitrogen configuration，selecting suitable water and nitrogen allocation is not only beneficial to increase jujube yield，but also achieve ideal water utilization efficiency and nitrogen fertilizer partial productivity.It can be concluded that the appropriate water and nitrogen configuration are 3000 m3/hm² of irrigation amount and 300 kg/hm² of nitrogen application rate，which can provide reference for high yield and high efficient production of jujube trees with filtration irrigation in the dry land of Tongxin area，Ningxia.