Magnetic attraction fixing seat

The utility model provides a magnetic attraction fixing base. The magnetic attraction fixing base comprises an upper cover, a base, a center magnet, a blocking piece, a suction cup, a support and an annular magnet. Wherein the upper cover can be assembled on the base in an up-and-down sliding manner; the central magnet is coaxially arranged and limited in the rotary convex part; the blocking pieceand the center magnet are coaxially arranged in an up-down sliding mode, the sucker is arranged on the other side of the base, a vent hole is formed in the center of the sucker, the support and the blocking piece are coaxially arranged, an air flow channel is formed in the center of the support, communicated with the vent hole and connected with the blocking piece, and the annular magnet and thecenter magnet are concentrically arranged. Therefore, the magnetic attraction fixing seat is linked with the blocking piece to open and close the air flow channel by pressing down or lifting up the upper cover, so that the mag