Digital printing has the advantages of variable data, printing according to the demand, individuation service. Therefore, its appropriation in the market of printing field is increasing year by year, and its quality draws near to the offset printing. This paper carries out experiment and does research into the tone reproduction characteristic on the color representation ability of Indigo3500 based on electric ink printing and Canon 7000VP digital printing machine based on carbon powder printing. By obtaining the dot characteristic curve and color gamut range and comparing its offset printing effect with Heidelberg CD102, this paper gets the conclusion: Each tone's dot gain curve of digital printing has the same variation tendency, the tone rendition of digital printing can simulate the offset printing effect. Color gamut has apparent discrepancies the color gamut of Indigo3500 is relatively broader, which can contain the offset printing color gamut. The color gamut range of Canon 7000VP is close to offset printing, but its color gamut range is apparently different. From the aspect of printing quality, the product of digital printing can meet the needs of common offset product. But from the aspect of microcosmic quality, the dot structure of carbon powder printing is not ideal, whose visual sensation is relatively inferior. The dot of electric ink is identical to the offset printing, whose visual sensation is close to the offset printing.