Understanding and mastering the control of surface states in topological materials are crucial steps for the development of future electronic devices and technologies that leverage the unique properties of these materials. Using angle-resolved photoemission spectroscopy, we provide a good case study of this by visualizing the electronic structure of a magnetic Weyl semimetal NdAlSi on both flat and uneven surfaces. Our observations reveal that the preparation of an uneven sample surface can effectively suppress all surface states in Weyl semimetal NdAlSi, including topological surface Fermi arcs. In order to better understand this experimentally observed phenomenon, we hope to use DFT calculations to help understand, including doing some calculations of the electronic structure of the bulk states and surface states.