The invention provides a silver chloride material with zigzag particle morphology and a solid-gas phase interface self-assembling synthetic method thereof and relates to the silver chloride material with zigzag particle morphology and a preparation method thereof. The objective of the invention is to overcome the problem that formation of special morphology of silver chloride cannot be controlled without addition of a stabilizing agent in the prior art. According to the invention, low-concentration silver nitrate in high-concentration hydrochloric acid undergoes layer-upon-layer self-assembling in a solid-gas phase interface at a certain temperature by using hydrogen chloride and silver nitrate volatilized into a gas phase so as to produce silver chloride with zigzag particle morphology. The silver chloride with zigzag particle morphology prepared in the invention is used for preparation of a precursor for a high-efficiency photocatalysis material Ag@AgCl.