The invention relates to the technical field of welding material preparation, in particular to a preparation method of an anti-splashing anti-cracking aluminum alloy welding wire. The method comprisesthe steps of taking kaolinite as a raw material; obtaining amorphous kaolinite powder through treating; mixing sodium silicate with the amorphous kaolin powder; obtaining modified amorphous kaolin particles after carrying out ball milling and drying; mixing the modified amorphous kaolinite particles with 6061 aluminum alloy powder to obtain an aluminum alloy wire rod; and then placing the aluminum alloy wire rod in a hot-pressing mould to be subjected to hot pressing to obtain the anti-splashing anti-cracking aluminum alloy welding wire. According to the method, interface force between a cryolite covering layer and the aluminum alloy welding wire can be improved by sodium aluminate salt at the interface of the kaolinite and the cryolite, carbon dioxide and water generated by carbon-seriesimpurities can be absorbed by the sodium aluminate salt, the impact effect on molten drops is weakened, so that the anti-splashing effect is achieved; the micro-expansion of the amorphous kaolinite at a high temperature can prevent the growth and aggregation of aluminum micro-grains in the aluminum alloy welding wire, and the harm of impurities is effectively reduced; and the 60611 aluminum alloypowder and ore powder enable the structure to be distributed in a welding joint more uniformly, and the application prospect is wide.