Abstract: A great deal of uncertain temporal information exists in emergency events.For that problem,a representation of uncertain temporal knowledge in emergency domain is realized firstly by introducing the traditional interval algebra method.And it takes the method of applying fuzzy processing to the breakpoints of the time interval and setting their value range.Then,the solution of evidence combination in temporal reasoning is proposed through the renewal of the combination of the time interval set,the temporal relation set and the probability assignment function.Finally,the solution is analyzed combining with an application example,thus the validity of the method is verified.