The invention belongs to the technical field common to equipment, and relates to an olive-like asymmetric bidirectional taper threaded connecting pair. The olive-like asymmetric bidirectional taper threaded connecting pair solves the problems of the poor self-positioning and self-locking performance of an existing thread. The olive-like asymmetric bidirectional taper threaded connecting pair is characterized in that an internal thread (6) is a bidirectional tapered hole (41) (non-solid space) of the inner surface of a cylindrical parent body (3), an external thread (9) is a bidirectional circular truncated cone table (71) (material body) of the outer surface of the cylindrical parent body (3), a complete unit body thread includes an olive-like (93) bidirectional cone, the left side taper (95) is greater than and/or less than the right side taper (96), the olive-like (93) bidirectional cone is spiral and is large in middle and small in two end, and the performance mainly depends on thesize of the conical surface and the taper of threaded bodies matched with each other. The olive-like asymmetric bidirectional taper threaded connecting pair has the advantages that the inner and outerthreads form multiple joints of circular cone pairs through the bidirectional tapered hole (41) and the bidirectional circular truncated cone table (71) in the manner that the tapered hole wraps thecone body until inner and outer cones are in spirally circular conical surface sizing fit or sizing interference to achieve the threaded connection function.