The invention relates to a magnetic control slip guy rope bottom-type sun blind, which consists of vanes, vane separation lines, a left guy rope, a right guy rope, a left guy rope reverse wheel, a right guy rope reverse wheel, a movable cross bar, a left friction wheel, a right friction wheel, a window frame, a movable pulley, a magnetic piece and a remote control magnetic piece, wherein one end of the left guy rope is fixed on the top left of the window frame, and the other end of the left guy rope respectively passes by the left friction wheel, the left guy rope reverse wheel, the right guy rope reverse wheel and the movable pulley and is fixed on a position on the top right of the window frame; one end of the right guy rope is fixed on the top right of the window frame, and the other end of the right guy rope passes by the right friction wheel and the right guy rope reverse wheel and is fixed on the same position on the top right of the window frame; the movable pulley is arranged on the magnetic piece; and the remote control magnetic piece is operated by the hand, so as to make the movable pulley and the magnetic piece move up and down, thereby the vanes of the sun blind are correspondingly deflected, unfolded and folded. The magnetic control slip guy rope bottom-type sun blind is simple and easy, is convenient to use, has novel and concise pattern and safe and reliable operation, and realizes synchronous control of deflection, unfolding and folding of the vanes.