The invention belongs to a measuring appliance of a high-speed railway rail slab, and in particular relates to an integral measuring platform of a high-speed railway CRTS II concrete rail slab. The invention solves the problems that six-point support is needed in rail slab measurement, and self weight loads in different proportions are required to be distributed to different support points. The integral measuring platform of the high-speed railway CRTS II concrete rail slab comprises an integral bracket and a load adjusting device, wherein the integral bracket is formed by welding two parallel longitudinal beams and three beams which are perpendicular to the longitudinal beams; both ends of each beam are respectively provided with sensor placing boxes; a box-shaped support vertical columns arranged on each sensor placing box; the load adjusting device comprises a jack which is inverted in the box-shaped support vertical column and a steel plate which is welded at the bottom of the jack; the steel plate is arranged on the top surface of the box-shaped support vertical column; and the top of a piston of the jack is level with the upper part of the sensor placing box. The invention has the advantages of integral hoisting in needed places, flexibility, convenience, novel concept, simple operation, convenient adjustment, high precision and high stability.