The spinner is an important part of the track iron roughneck, and its force and motion characteristics have an important impact on the performance of the whole machine. A new type of track iron roughneck spinner was proposed, the mechanical model of the spinner was established, ADAMS software was used to analyze its mechanical characteristics. Then, the kinematics analyses of the key hinge points of the spinner were carried out by using the structure analysis and synthesis method of the mechanism. The research results show that the contact force and driving force of the spinner during the turnbuckle process are all within the allowable range, which proves the rationality of the structure design of the spinner; the displacement equations, velocity equations and acceleration equations of the key hinge points of the spinner were established, then the movable range of the deflection angle α2 is obtained as 5° to 76°, the movable range of α3 is 14° to 85° and the movable range of α4 is 0°to 65°.