The invention relates to electronic silver paste and a preparation process thereof, belonging to the technical field of production of such base materials as electronic ceramic components, thick film hybrid circuits, touch components and the like. The electronic silver paste is prepared by mixing and stirring 4-9% of glass powder, 63-80% of silver powder, 12-28% of organic carrier and 0.2-2% of additive, rolling, dispersing and grinding the mixture, then adding 1-2wt% of bismuth stearate, stirring the mixture uniformly and filtering the mixture with a screen. The electronic silver paste and the preparation process have the following beneficial effects: the glass powder system does not contain lead; the minimum grain size and shape of the silver powder are not strictly required; and the silver paste is especially suitable for the positive electrodes of the solar cells on the crystalline silicon solar cell silicon substrates produced in large batch and has excellent electrical property and mechanical property..