Abstract: From May 1998 to April 2001,time budget of semifreeranging Amur tigers was conducted in Heilongjiang Amur Tiger Park by focal animal sampling method.The results showed that:moving (37.53%) and resting (32.45%) occurred more,and standing (6.24%),eating (10.13%),social (8.36%) and other (5.29%,including drinking,eliminating,grooming and so on) behaviors did less;activity rhythm was no differences in different seasons,but moving and social behaviors happened more in summer and winter than did in spring and autumn;moving,eating,standing and social behaviors had two activity peak periods,one in a.m.and the other in p.m.respectively,and resting had one activity peak period at noon.The above results were compared with those of captive and wild Amur tigers,and some strategies were suggested for improving the survival ability of semifree-ranging Amur tigers.