The invention provides the technical scheme of a normal pressure hobbing cutter and teeth cutter exchange technological method for compound stratum shield. The technological method comprises the following operation steps of cutter drum washing, oil cylinder fixing, cutter drum bolt loosening, oil cylinder retraction, cutter drum hoisting, gate washing, gate closing, balancing of the pressure difference between the interior and the exterior of a gate, oil cylinder thorough retraction, oil cylinder dismounting and temporary storage, cutter drum complete drawing-out, replacement of a tool on a cutter drum and cutter drum mounting. By adoption of the technological method, a normal pressure hobbing cutter replacement technology and a normal pressure hobbing cutter and teeth cutter exchange technology are successfully achieved for the first time, the cutter replacement time is greatly shortened, cost is reduced, and smooth excavation of a shield tunneling machine is ensured.