The dispersion curve of one-dimensional metal-dielectric structure is calculated, and the finite-difference time-domain (FDTD) method is used to simulate the self-collimation in one-dimensional metal-dielectric structure, to which a Gaussian beam is incident at different angles. The influence of the dissipation of the metal layer on self-collimation is discussed. Subwavelength imaing with the one-dimensional metal-dielectric structure is also analyzed. The resolution of λ/8 is achieved for single point source when the thickness of 1DMD is equal to λ/2. The resolution will gradually degrade as the source moves beyond the near-field domain. Imaging with double slits source is also demonstrated, and a resolution of λ/3 is achieved.