The utility model discloses a portable computer tomography device, include: the supporting seat, scanning system, it includes the carousel, is fixed in the bulb and the detector at carousel rear portion, be fixed in the anterior sliding ring of carousel and driven gear, and the driven driving gear of driven gear cooperation, drive initiative gear revolve's rotation motor, the front portion of carousel still is provided with the bearing, the straight line driver, the one of which end hinge connect in on the supporting seat, the straight line driver the other end articulate in circle in the bearing, connecting axle, its one end rigid coupling have a hornblock, the hornblock rigid coupling in circle in the bearing, the other end pin joint of connecting axle in the lateral part of supporting seat, be connected with the encoder on the other end of connecting axle. The utility model discloses an inclination state is work down that's portable computer tomography device, safe and reliable, transmission precision is high, can realize scanning system necessarily is provided.