The invention discloses a contact-type central water-discharging permanent magnet synchronous electric spindle. The contact-type central water-discharging permanent magnet synchronous electric spindle comprises a machine body, a stator, a permanent magnet spindle core assembly, an air cylinder assembly and a central water-discharging assembly; the permanent magnet spindle core assembly comprises a permanent magnet rotor, a between-spindle sleeve and a spindle core, the permanent magnet rotor is arranged on the spindle core in a sleeving mode, and the spindle space sleeve is arranged above the permanent magnet rotor; the air cylinder assembly is arranged at the upper end of the machine body and comprises a first air duct, a second air duct, an air cylinder top cover, a first piston and a second piston, the air cylinder top cover, and the first piston and the second piston sequentially abut against from top to bottom in the central axial direction of the electric spindle; the central water-discharging assembly comprises a rotary connector, a connecting rod, a pulling rod, a sliding core and a pulling claw which are sequentially connected from top to bottom, the pulling claw is arranged on the lower end portion of the sliding core in a sleeving mode, the pull claw and the sliding core slide oppositely so that the pull claw can switch under the stretching and retracting states. According to the contact-type central water-discharging permanent magnet synchronous electric spindle, central water discharging is achieved, the cooling problem and the difficult problem of chip removing of tools in the ceramic processing and deep hole processing are solved.