The invention belongs to the technical field of organic synthesis and particularly relates to a preparation apparatus and method of kresoxim-methyl intermediate. The apparatus comprises a reactor, a condenser, a centrifuge, a material tank and a mass flow meter which are connected with one another; the method comprises: using phthalide, o-cresol and sodium methylate as materials, preparing 2-(2-methylphenoxy)-methylene benzoic acid first, and then preparing 2-(2-methylphenoxy)-methylene benzoyl cyanide through chlorination and cyanidation. The apparatus is simple in structure and reasonable in design; all materials are domestic, a single common solvent is selected, and recycling of the solvent enables reduced wastewater, reduced environmental load and reduced production cost; by optimizing process conditions, reaction conversion rate is increased, product content and yield are also increased, and the apparatus and method are suitable for industrial production.