Accurate deburring oil cylinder with controllable stroke

The invention relates to the field of deburring oil cylinders, in particular to a stroke-controllable accurate deburring oil cylinder which comprises a base, an oil cylinder body and a piston rod, and the oil cylinder body is composed of an upper pipe body, a lower pipe body and a middle connecting sleeve. A first oil port, a second oil port and a third oil port are formed in the upper half portion of the upper pipe body, the lower half portion of the lower pipe body and the side wall of the middle connecting sleeve respectively, a middle piston is arranged in the middle of the piston rod, and a stroke sensor is further installed on the base. The stroke controllable device comprises a guide sleeve, a supporting piece and an oil pressure outer supporting mechanism, and a driving device used for driving the guide sleeve to slide is further arranged on the outer wall of the lower pipe body. And it is guaranteed that the piston rod can move to the specified stroke, the moving range of the piston rod is enlarged,