The Dark Matter Particle Explorer (DAMPE) is a space-borne high-energy charged cosmic ray and gamma-ray detector launched on December 17, 2015. After more than three years of operation in space, about 6 billion events are recorded, including 0.2 million photons above GeV energies. In this talk, we introduce some fundamental works of DAMPE. The preliminary results of the bright source list, the monochromatic gamma-ray line search and the pulsar analysis are also presented.