The invention belongs to the field of vacuum equipment, and particularly relates to a claw type vacuum pump. The claw type vacuum pump comprises a pump body, sealing plates at the two ends of the pumpbody, a pump cavity formed through the arrangement of the pump body and the two sealing plates in a surrounding manner, two rotor shafts which transversely penetrate through the pump cavity and are located on the same horizontal plane, and two claw type rotors positioned in the pump cavity; the two rotor shafts are synchronously and reversely rotated, and the two rotors are arranged on the two rotor shafts and are in conjugate engagement with the two rotor shafts; end covers are installed on the outer side of the sealing plates to form an oil tank; clearances of 0.20-0.25 mm are left betweenthe rotors and the sealing plates on both sides; and a pump inlet and a pump outlet are formed in the upper end and the lower end of the pump body respectively and are opposite to the meshing parts ofthe two claw type rotors. According to the claw type vacuum pump, the rotors can be effectively prevented from being locked, the whole pump can easily deal with complex working conditions of dust, viscous substances, easy carbonization and easy coking, and normal work is ensured; and the claw type vacuum pump can be used as vacuum obtaining equipment, can also be used for conveying gas, viscous liquid and the like, and has various functions.