The utility model provides a collar of an antifriction and torsion reduction well drill, and aims to overcome the defect that the prior collar in the drilling operation of a directional well is easy to be damaged in a state of complex loading and cannot perform the function of antifriction and drag reduction. The collar comprises a body (1), an antifriction cover (4) and a rolling wheel (5); a centralized band (14) is evenly distributed on the outer periphery of the antifriction cover (4); the rolling wheel (5) is installed in the slot formed at the central part of the centralized band (14); a shield ring (2), an internal sleeve (3),a shield ring (2) and a lower joint(7) are arranged sequentially from top to bottom on the outer periphery of the body (1); the antifriction cover (4) is installed on the outer periphery of the internal sleeve (3) arranged between two shield rings (2); a radial sliding bearing (8) is arranged between the antifriction cover (4) and the internal sleeve (3); and the contact surface of the upper and the lower end surfaces of the antifriction cover (4) and the shield ring (2) is an axial sliding bearing (9). The collar has the beneficial effects of reasonable structure, and can effectively reduce the friction and the torsion during the operation of a horizontal well drill, an extended reach drilling and a sidetracking well.