A freely combinable tension fabric popup display, comprising: an exhibit grid frame; and aluminum grooved straight rods, connected to eight sides on the two planes of the exhibit grid frame; wherein a popup display with a preset size and shape is provided by combining a plurality of tension fabric popup displays as needed, the aluminum grooved straight rods for adjacent tension fabric popup displays are locked by a plurality of fasteners, characterized in that the fasteners have horizontal fasteners and vertical fasteners, the fasteners include a base plate, a mobile plate, a cover plate and a rotation shaft; a first clamp plate with a bend is located at an end of the base plate; the rotation shaft penetrates through the base plate, and a rotation shifting block is provided on the rotation shaft below the base plate; an eccentric cylinder is provided at a top end of the rotation shaft above the base plate; a second clamp plate with a bend is provided at an end of the mobile plate, a circular aperture engaged with the eccentric cylinder is provided in the mobile plate, and the mobile plate is set around the eccentric cylinder via the circular aperture; the first clamp plate and the second clamp plate have a same orientation while the bend of the first clamp plate is opposite to the bend of the second clamp plate; the cover plate is provided above the mobile plate to prevent the mobile plate from being removed from the eccentric cylinder; the first clamp plate and the second clamp plate are locked and released by rotating the rotation shifting block to drive the mobile plate to move; for the horizontal fastener, the bend of the first clamp plate and the bend of the second clamp plate are at the same level, while for the vertical fastener, the bend of the first clamp plate is higher than the bend of the second clamp plate; and a display before or after the combination is formed by inserting silicon strips at edges of the display into grooves of the aluminum grooved straight rods. an exhibit grid frame; and aluminum grooved straight rods, connected to eight sides on the two planes of the exhibit grid frame; wherein a popup display with a preset size and shape is provided by combining a plurality of tension fabric popup displays as needed, the aluminum grooved straight rods for adjacent tension fabric popup displays are locked by a plurality of fasteners, characterized in that the fasteners have horizontal fasteners and vertical fasteners, the fasteners include a base plate, a mobile plate, a cover plate and a rotation shaft; a first clamp plate with a bend is located at an end of the base plate; the rotation shaft penetrates through the base plate, and a rotation shifting block is provided on the rotation shaft below the base plate; an eccentric cylinder is provided at a top end of the rotation shaft above the base plate; a second clamp plate with a bend is provided at an end of the mobile plate, a circular aperture engaged with the eccentric cylinder is provided in the mobile plate, and the mobile plate is set around the eccentric cylinder via the circular aperture; the first clamp plate and the second clamp plate have a same orientation while the bend of the first clamp plate is opposite to the bend of the second clamp plate; the cover plate is provided above the mobile plate to prevent the mobile plate from being removed from the eccentric cylinder; the first clamp plate and the second clamp plate are locked and released by rotating the rotation shifting block to drive the mobile plate to move; for the horizontal fastener, the bend of the first clamp plate and the bend of the second clamp plate are at the same level, while for the vertical fastener, the bend of the first clamp plate is higher than the bend of the second clamp plate; and a display before or after the combination is formed by inserting silicon strips at edges of the display into grooves of the aluminum grooved straight rods.