The invention provides a woodworking square hole drill, wherein a drill sleeve is arranged on the outer portion of a drill core in a sleeved manner, the front end of the drill core is provided with adrill tip, the drill sleeve comprises a clamping part, a guide part, a sawdust discharge groove, a sawdust discharge hole I, a drill bit installation groove I, a drill bit installation groove II and asawdust discharge hole II, wherein the guide part is arranged on one side of the clamping part, both sides of the clamping part are provided with wind suction devices, the sawdust discharge hole I isarranged on the outer wall of the guide part, the sawdust discharge groove penetrates through the guide part and the sawdust discharge hole I, the center of the clamping part is provided with the drill bit installation groove I, the center of the guide part is provided with the drill bit installation groove II, the outer side of the guide part is provided with the sawdust discharge hole II penetrating through the guide part, the drill core is provided with a spiral sawdust outlet groove, the sawdust discharge hole I is provided with an elastic position limiting member matched with the drill core, and the outer side of the clamping part is provided with a snapping groove. According to the present invention, under the co-action of the sawdust discharge groove and the sawdust discharge holes, the wind suction devices rapidly apply the adsorption force on the sawdust, the broken sawdust generated by the drilling is rapidly discharged, and the elastic position limiting member is arranged on the periphery of the drill core so as to stabilize the drill core and reduce the shaking degree.