The invention discloses an equal-circle adjustable curve cutting device for rodlike vegetables and fruits. The equal-circle adjustable curve cutting device for rodlike vegetables and fruits structurally comprises a handhold rod, a balance vertical board, a screw rod, an equal-circle adjusting device, a frame board and a base; the balance vertical board and the frame board are perpendicularly welded to the left and right horizontal ends of the base; the equal-circle adjusting device is installed at the top end of the frame board; the handhold rod is perpendicularly welded to one end of the screw rod; the other end of the screw rod penetrates through the balance vertical board and then is matched with the equal-circle adjusting device on the frame board; a round hole is drilled in the frameboard; the equal-circle adjusting device comprises a cutter adjusting structure and two equal-circle cutting structures; the cutter adjusting structure is installed at the top end of the frame board;and the two equal-circle cutting structures are in central symmetry with respect to the circle center of the round hole of the frame board. Through cooperation of the cutter adjusting structure and the equal-circle cutting structures, on the one hand, equal cylinder cutting is conducted; and on the other hand, a blade is adjusted well, the cutting depth is adjusted, rotary cylinder cutting is achieved finally, and a strip of complete curved rodlike vegetable or fruit is obtained by cutting and is not interrupted.