The utility model relates to a hollow brick extrusion mould with a composite core. The composite core is composed of a pressure plate, a composite core forming section and a composite core transition section. The composite core forming section is combined by forming section core materials and forming section wear plates. The forming section core material and the forming section wear plate are connected in a welding or bonding manner. A concave-convex groove is adopted in the connection between the composite core transition section and the composite core forming section, and the length adjustment of the transition ranges from 15mm to 210mm, the transition section and the core rod are connected by adopting a concave-convex groove, and the position of the composite core is determined by matching the positioning block on the core rod. The composite core of the utility model adopts a manner of connecting the easy-processing material and the wear resistant material so as to guarantee the accuracy of the core size and solve the problem of the core wear resistance; then, the composite core forming section and the composite core transition section are connected by the concave-convex groove provided with the positioning function, the composite core transition section and the core rod are connected by the concave-convex groove provided with the positioning function, thereby achieving the purpose of preventing rotating and solving the problem of waste brick product resulting from the mudflow speed change caused by rapid rotation and abrasion of the core.