In the cultural relics archaeology and display of cultural relics itself, digital information transformation and display can better display the information of cultural relics, expand the connotation and form of historical and cultural dissemination, but also can be combined with digital technology for information interaction and collection and archiving, to provide an effective means of supplementation for the construction of digital museums and cultural heritage protection. Digital three-dimensional reconstruction of cultural relics can maximize the retention of the appearance of cultural relics information, and effectively save the storage resources and space required for the preservation of cultural relics information. It has an important significance to the work of retention. In view of the above problems, a neural radiation field method is introduced for digital three-dimensional reconstruction of bronze cultural relics, and the reconstruction effect of tilt photography, 3D Gaussian-Splatting and other methods is compared. The results show that realistic neural radiation field can achieve better reconstruction effect in a short time, and is expected to provide new expansion ideas for digital display of cultural relics, digital interaction, and intelligent exhibition space.