The invention discloses a solar cell front electrode preparation method, comprising the steps of: a) successively etching and diffusing a silicon chip and removing phosphosilicate glass; b) placing a mask on the front side of the silicon chip, wherein the mask is provided with hollow holes; c) placing the silicon chip and the mask in a carbon nanotube reactor; d) starting the carbon nanotube reactor, forming carbon nanotubes in the hollow holes of the mask, and allowing the carbon nanotubes and the front side of the silicon chip to form ohmic contact; e) removing the mask, and forming a carbon nanotube array on the front side of the silicon chip; f) placing the silicon chip in a transparent conductive film reactor; g) starting the transparent conductive film reactor to form a transparent conductive film on the front side of the silicon chip; and h) screen printing Ag main grids and performing high temperature sintering. The carbon nanotube/transparent conductive film/Ag main grid combined electrode can reduce Ag consumption, and improve cell conversion efficiency.