Abstract: Abstract：On the basis of tradition groove turning device，The design scheme of the new type of vehicle slot device is completed，and the advantages and disadvantages of the two are compared.；establishing mathematical model of new groove turning device.Using the finite element analysis software, check the new type groove turning decice strength and stiffness。The results show that the operation of the new type groove turning decice is simple, efficiency and high precision, can meet the strength and stiffness requirements.