Aluminum paste for ultrathin silicon wafer solar battery

The invention discloses aluminum paste for an ultrathin silicon wafer solar battery. The aluminum paste comprises the following components in percentage by weight: 35-50 percent of aluminum power composition, 40-60 percent of organic bonding agent, 0.5-5 percent of inorganic bonding agent and 2-15 percent of filler, wherein the aluminum power composition is prepared from 5-50 percent by weight of spherical aluminum powder and 50-95 percent by weight of flaky aluminum powder. The aluminum paste is suitable for making ultrathin silicon chip solar batteries; and the prepared ultrathin battery piece has the advantages of good appearance, low warping degree, low fragmentation rate and high photoelectric converting efficiency.