Simple type floating support combination mechanism

The invention discloses a simple type floating support combination mechanism. The simple type floating support combination mechanism comprises a rectangle fixing block, a floating block and a fastening sunk screw, wherein a rectangle mounting seat is arranged at the bottom of the rectangle fixing block, a positing hole is formed in the bottom of the rectangle mounting seat, a spherical groove is formed in the top of the rectangle fixing block, a tapped blind hole which extends downwards is formed in the middle of the spherical groove, the floating block is a hemispheric block matched with the spherical groove and right placed in the spherical groove, a sunk slotted hole corresponding to the position of the tapped bind hole is formed in the middle of the top face of the hemispheric block, the left side and the right side of the top face of the hemispheric block respectively extend upwards so as to form crescent work piece support faces, the fastening sunk screw connects the rectangle fixing block with the floating block, a hollow area is arranged in the middle of the rectangle fixing block, and weight reduction oblique angles are formed at four corners of the top of the rectangle fixing block. The simple type floating support combination mechanism is specially used for supporting a work piece with a rough bottom face, can reliably position the work piece by using a pressing block in combination, and prevents the work piece from swinging during the drilling process.