Positioning mechanism for smart card

The utility model discloses a positioning mechanism for a smart card. The positioning mechanism for the smart card comprises a plurality of positioning pillars which are arranged on a rotating table and used for clamping the periphery of the card. The positioning pillars on two adjacent edges of the card are fixed positioning pillars, two fixed positioning pillars are arranged on one edge of the card, and one fixed positioning pillar is arranged on the other edge of the card. The positioning pillars on the remaining two adjacent edges of the card are movable positioning pillars, and at least one movable positioning pillar is arranged on each edge of the card. Each movable positioning pillar is in rotatable connection with the rotating table through a rotating shaft, an inclined plane is arranged on the lower portion of each movable positioning pillar, and straight-line motion mechanisms which can act on the inclined planes and push the movable positioning pillars to rotate around the rotating shafts are arranged on the inclined planes. Each movable positioning pillar is further connected with a spring used for urging the movable positioning pillar to be clamped on the corresponding edge of the card in a normal state. The positioning mechanism is applied to the rotating table, the card can be accurately positioned and reliably fixed, and the card can also be put in and taken out conveniently.