The invention relates to a floating press-fitting device which is characterized by comprising a rack, a press-fitting power unit, floating guiding shafts, guiding sleeves, a supporting plate, a power unit mounting plate, a workbench panel, a workpiece clamping device, a clamp table panel, fixing-connecting rods, linear bearings, floating connecting columns, a cross beam, dead stop blocks, a lifting air cylinder, keyway guiding sleeves, keyway guiding rods, a lifting connecting plate, a press head, a floating connecting part, an air cylinder bracket, a locking air cylinder; a locking rod connecting plate, a locking rod and a profiling supporting block. The floating press-fitting device provided by the invention has the advantages that parts of various types and workpieces of various structures can be subjected to stable press-fitting; in the workpiece press-fitting process, uncontrollable factors such as the inclination and the deformation can be avoided, the press-fitting success rate and the press-fitting size stability can be improved, and the press-fitting workpieces can be conveniently taken and placed; during the press-fitting, the press-fitting power unit can be voluntarily regulated in a floating manner along with changes in the press-fitting position, thereby automatically adapting to the workpiece press-fitting state; and accordingly, the press-fitting of products of different structures and shapes can be achieved.