Effect of water stress on soluble sugar and proline content in ’Apple-pear’ was studied. The results showed that the soluble sugar tended to increase by water stress and the increase order was severe＞moderate＞mild water stress in ’Apple-pear’ under pot cultivation. As the water stress prolonged, content of soluble sugar increased at first and then decreased. After recovering irrigation, all index recovered to the normal state. The proline Content in the leaves of Apple-pear’ was sensitive to drought. The sensitive period of field-grown and pot-grown ’Apple-pear’ was about 28d and 11d, respectively.