The invention discloses a dust removal device for wood processing and belongs to the technical field of wood processing equipment. The dust removal device includes a shell body. Interior of the shellbody is divided into a gas inlet chamber and a gas outlet chamber by a flow-guiding bended plate. A gas inlet is arranged on a part, which is corresponding to the gas inlet chamber, of the upper partof the shell body. A water spray pipe is arranged on a side wall, below the gas inlet, of the shell body. The water spray pipe has a vertically downward water spray portion and a horizontally extendedflow-guiding water spraying portion, wherein the water spray portion and the flow-guiding water spraying portion are both provided with nozzles towards a gas pathway. The lower part of the bended plate has an S-like shaped flow guiding portion which has an upward terminal. A gas outlet is arranged on a part, which is corresponding to the gas outlet chamber, of the upper part of the shell body. Awater outlet is arranged on the bottom of the shell body. The dust removal device solves the problems of large occupied area and high cost of dust removal devices used for wood processing in the priorart.