Preparation method of high-dispersion spherical silver powder for front silver paste of solar cell

The invention discloses a preparation method of high-dispersion spherical silver powder for front silver paste of a solar cell, which specifically comprises the following steps: (1) preparing a silver-containing solution with the silver ion concentration of 100-500 g/L; (2) preparing a reducing solution containing a reducing agent; (3) preparing a pH adjusting solution, and adding the pH adjusting solution into the silver-containing solution; and (4) preparing a dispersing agent solution, adding the dispersing agent solution into the reducing solution, then rapidly mixing with the silver-containing solution, carrying out reduction reaction to generate silver powder, and carrying out solid-liquid separation, cleaning, drying at 60-100 DEG C, crushing and screening to obtain the superfine silver powder. The obtained superfine silver powder is good in dispersity, uniform in particle size distribution and good in sintering activity, and has the advantages that the paste printing performance is improved, the conta