The invention relates to a drilling and tapping integrated machine which comprises a feeding mechanism, a clamping mechanism, a drilling and tapping mechanism and a moving mechanism. The drilling andtapping integrated machine is characterized in that the positions of an adjustable support plate and an adjustable baffle in the feeding mechanism can be adjusted relative to a feeding baffle so as toadapt to different-size workpieces, the clamping mechanism comprises a working table provided with equal-distance V-shaped grooves for containing the to-be-machined workpieces at equal intervals anda clamping air cylinder fixed to a clamping air cylinder support, the drilling and tapping mechanism comprises a servo motor main shaft system capable of conducting drilling and tapping on the two workpieces synchronously, the moving mechanism of the workpieces is achieved in the manners that a jacking air cylinder pushes a workpiece support plate and a feeding air cylinder pushes a movable sliding plate. The drilling and tapping integrated machine has the advantages that the two workpieces can be subjected to drilling and tapping operation synchronously through one equipment, the structure issimple, the cost is saved, the machining efficiency is high, and operation is convenient.