Through adopting the salt water irrigation experiment of different salinities, the paper studied the influence of salt water drip irrigation on the physiological characters of jujube tree in arid area. The results show that when using fresh water to irrigate，the light intensity is the main factors which affect photosynthetic rate and transpiration rate of jujube tree. When using saline water to irrigate, both the salinity of irrigation water and light intensity have certain influence on jujube tree photosynthetic rate and transpiration rate. The photosynthetic rate and transpiration rate of jujube tree obviously appear single peak irrigated by 2g/L salt water, it appears not only single peak but also double peak feature irrigated by 3g/L salt water, but it has no obvious single peak and double peak feature irrigated by 4g/L salt water. The higher the increase of salinity of salt water, the more obviously the content of chlorophyll in the leaf of jujube tree reduces. The content of chlorophyll of jujube tree in different treatments is more obviously impacted by the salinity of salt water significant. The electrolyte leakage rate and proline of leaf increase with the increase of salinity of salt water. The difference affected by salinity of salt water is significant. So, in order to reduce the damage of salt stress to physiology of jujube tree,it is necessary to consider a suitable rotation irrigation method by fresh water and salt water when using salt water to irrigate in arid area.