The utility model discloses an assembly fixture of a permanent magnet part of an electromagnetic control mechanism. The assembly fixture is characterized in that a bracket, a fixed plate and a telescopic clamp plate are included, wherein the fixed plate and the telescopic clamp plate are arranged opposite to the upper surface of the bracket; the telescopic clamp plate is connected with the bracket through a lead screw nut mechanism; a bolt positioning hole used for fixing a lateral plate of the mechanism to be mounted is formed on the telescopic clamp plate during assembly; a standstill locking guiding mechanism is arranged between the telescopic clamp plate and the bracket; and a mounting through hole, which is opposite to the bolt positioning hole and used for fastening the insertional clearance of objects, is formed on the fixed plate. The assembly fixture provided by the utility model has the advantages that the permanent magnet part of the electromagnetic control mechanism is slowly and stably assembled through the lead screw nut mechanism; and the assembly efficiency and safety are improved.