The invention relates to a module combined type wood dryer. The module combined type wood dryer comprises a dryer main body, a heat carrier backflow supply pipeline and a steam backflow supply pipeline which are vertically arranged on the ground of a drying chamber; the dryer main body comprises a plurality of rows of dryer modules which are arranged in an up-down parallel manner, and the plurality of dryer modules which are arranged in parallel are arranged in each row of dryer modules; a fan, a heating coil pipe, a steam spraying pipe and a static pressure box are sequentially arranged in each dryer module in the flowing direction of gas, and the fan, the heating coil pipe, the steam spraying pipe and the static pressure box for each dryer module are arranged on a shell body with openings in two ends; a plurality of nozzles are arranged on each steam spraying pipe; and the heating coil pipes and the steam spraying pipes in the same row are correspondingly connected in series, and theheating coil pipes and the steam spraying pipes which are correspondingly connected in series are incorporated into the heat carrier backflow supply pipeline and the steam backflow supply pipeline respectively. According to the module combined type wood dryer, the modular assembly of the wood dryer is realized, and the disassembly and the assembly of the wood dryer are flexible and convenient; and wood can be uniformly heated, the drying quality of the wood is improved, energy is saved, and the consumption is reduced.