An operation platform device capable of realizing adjustment of various postures comprises a base assembly, a positioning assembly, a transmission mechanism, a reversing mechanism and an indicating mechanism. The base assembly comprises a cylindrical lower base plate and a cylindrical upper base plate. The positioning assembly comprises square supporting legs, a shell, an upper positioning long plate and a lower positioning long plate. The transmission mechanism comprises a bevel gear, a straight gear, a left front transmission shaft, a right front transmission shaft, a left rear transmissionshaft, a right rear transmission shaft, a middle upper transmission shaft, a middle lower transmission shaft, a left end sliding bearing, a right end sliding bearing, a lead screw nut pair, a rockinghandle, a rocking bar and a working table. The reversing mechanism comprises a stop lever, a gear shifting indication board, a spherical hinge, a gear shifting frame, a middle movable long plate, an opening-adjustable double-rod assembly and a reversing slideway assembly; the indicating mechanism comprises a displacement adjusting graduated scale, an angle adjusting indicator and a rotary dial; the invention belongs to a position adjusting device, and solves the problem that the position of a workpiece is difficult to accurately and quickly adjust in various postures in the existing machiningprocess.