The invention discloses a 360 DEC G 3D object-surrounding interactive device, which comprises a fixed seat, a rotary wood seat, a rotary table, a projecting device, a 3D sensing controller, a magnifier simulation device and a computer. The rotary wood seat is arranged in the fixed seat and buckled through a turntable; the rotary wood seat is provided with a rotary position sensor for sensing an angle of rotation and judging the angle to be rotated synchronously of a 3D object-surrounding image displayed by an object display device through computation of the computer; the rotary table is buckled on the rotary wood seat and provided with a refraction mirror, a projecting panel and a 3D sensing transmitter; the 3D sensing transmitter computes partial image to be magnified or reduced of a display panel of the magnifier simulation device through the computer by sensing a current distance between the coordinates of the magnifier simulation device and the object display device in coordinationwith a 3D sensing receiver arranged on the magnifier simulation device so as to magnify the partial image by simulating the function of the magnifier.