A 3D (three dimensional) printing process with laser beam scanning in archimedes spiral way comprises a laser and optical system, a turntable and guide rail guide frame system, a spindle motor and guide frame shift servo motor system, and a computer control system. A laser is mounted on a turntable laser disc or a turntable guide frame, or is mounted independently from a turntable, a laser beam is focused onto a printer working plane by a stationary reflector of turntable optical system and a reflector and a lens on the guide frame, or, a laser beam of a laser on the guide frame is focused onto the printer working plane by the lens; when the turntable is driven by a spindle motor to rotate in local constant angular velocity or constant angular velocity, and the guide frame is driven by a servo motor to move horizontally in constant velocity, omission-free and no-repeat archimedes spiral scanning of the laser beam on SLA, SLS, SLM and LOM printing working planes can be completed, and after layer-by-layer processing, a workpiece body is obtained. The printing process can realize no-distortion and high quality scanning of ultra large working planes and processing of ultra large workpieces, has the advantages of simple structure, low cost and excellent quality, is especially suitable for printing aerospace, aviation, electric power, marine, construction and other large complex workpieces.