  We propose a new one-dimensional lattice model with strong asymmetric
interaction potential and investigate heat conduction in this model
numerically. We find that Fourier law is obeyed. Based on the phonon theory, we
find a new scattering mechanism of phonon because of the breaking of the
lattice segment. It is shown that in most of scattering process in this model
momentum is destroyed as well as the Umklapp phonon-phonon scattering process
which leads to the normal heat conduction. At last, we extend our analysis to
the same class model with asymmetry interaction potential and get a general
conclusion.
