Abstract: To long-term preserve calligraphic manuscripts, it is necessary to model their font structures on computer. In this paper, solid models were established based on the hexahedral grid algorithm, the contour lines layer by layer were calculated, the scanning line filling algorithm was adopted to simulate the calligraphic font structures and construct digital calligraphic font model. The established calligraphy font model can record different calligraphers' writing technique. Furthermore, a slice technology was developed to cut font structure in all directions. The technology could be used to analyze and study the font structure from various angles. The simulation results of 3D model calligraphy font show that the technology is able to vividly simulate different font structures of different calligraphers, thus achieving long-term preservation of calligraphic manuscripts.