The invention provides a cutting and grinding integrated machine which comprises a shell, two mounting frame assemblies and a direction adjusting mechanism. A sliding rod is arranged on the lower endface of the shell, and sleeved with two third sliding blocks. The lower ends of the two third sliding blocks are provided with supporting rods correspondingly, and the lower ends of the supporting rods are movably connected with the mounting frame assemblies correspondingly. The two mounting frame assemblies are symmetrically arranged, and the end face of the limiting end of the upper end of eachmounting frame assembly is in a circular arc shape and is provided with gear teeth. The direction adjusting mechanism is arranged in the middle of the sliding rod, and comprises fifth sliding blocks which vertically slide and are located between the two mounting frame assemblies. The two ends of the fifth sliding blocks are provided with gear teeth engaged with the end faces of the limiting ends.By using the cutting and grinding integrated machine, the function of cutting or grinding can be switched according to the need, the effect that one machine has multiple purposes is achieved, and theflexibility, convenience and rapidness are achieved.