The invention discloses a high-reliability self-driving type magnetic suspension bend and straight composite circulation type conveying unit. A flexible conveying belt is arranged on rotors through connecting blocks, and the rotors are connected with magnetic suspension workbenches. The periphery of a bearing guide rail is sleeved with the magnetic suspension workbenches. The bearing guide rail is arranged on a bearing block. The bearing guide rail is composed of a straight line section and a circular arc section. A plurality of sets of symmetrically-arranged bearing electromagnets and a set of symmetrically-arranged guiding electromagnets are distributed on the inner side of each magnetic suspension workbench. Vertical displacement sensors and horizontal displacement sensors are arranged at the positions of the bearing electromagnets and the guiding electromagnets correspondingly. Supports are arranged on the two sides of the bearing guide rail. A plurality of stators are evenly distributed on straight line sections of the supports. The installing height of the stators is consistent with the height of the rotors when the magnetic suspension workbenches are stably suspended, and a coil is wound around each stator. The high-reliability self-driving type magnetic suspension bend and straight composite circulation type conveying unit is reasonable in structure, high in conveying precision and high in reliability, and the periodical cyclic movement of the magnetic suspension technology is achieved.