Abstract: In this paper,the partial differt1ntial equation,which describs linear di;tributed parametersystems(DPS) with unknown parameters,is transformed into matrix equation using block pulse funtions(BPF),and the parameters of the linear DPS are identified by leastuare n1ethod.A computed example hasbeen given in the paper, and the result sliows BPF identification method is simpler.easier to realize, and ithas higher identification precision.