Main shaft loading testing device of simulated condition

The utility model relates to a gold cutting numerically-controlled machine tool in the technical field of machinery and particularly relates to a main shaft loading and tool main shaft dynamic property testing device of a simulated condition. The device comprises an axial electrical eddy-current sensor and two radial electrical eddy-current sensors which form a 90-degree angle and are arranged on the shaft shoulder of a main shaft through a sensor support, and a servo motor is connected with a belt pulley on the back end portion of a main shaft unit through a belt. A testing knife handle is arranged on the front end portion of a main shaft unit, a radial loading measuring head and an axial loading measuring head are fixed on a testing platform through a radial or axial loading nut seat and a radial or axial force guide seat to be on a vertical side or the end portion of the loading testing knife handle and enable the radial or axial loading measuring head to be coaxial with the radial or axial loading screw.