The invention discloses a mechanical finger driven by a pulling line, and belongs to the field of mechanical fingers. The problems that an existing mechanical finger is complex in structure and high in cost are solved. The mechanical finger driven by the pulling line comprises a first finger section, a second finger section, a base, a first cylindrical pin, a second cylindrical pin, a third cylindrical pin, a first resetting torsion spring, a second resetting torsion spring, the pulling line and a driving device, wherein the second finger section and the base are hinged through the second cylindrical pin; a second containing cavity is formed in the front side of the second finger section, the second cylindrical pin is located in the second containing cavity, a fourth cylindrical pin is arranged in the second containing cavity, and the second resetting torsion spring is arranged on the second cylindrical pin in a sleeving mode; the upper end of the second finger section and the first finger section are hinged through the first cylindrical pin, a first containing cavity is formed in the rear side of the first finger section, the first cylindrical pin is located in the first containing cavity, the third cylindrical pin is further arranged in the first containing cavity, and the first resetting torsion spring is arranged on the first cylindrical pin in a sleeving mode; and the two ends of the pulling line are connected with the third cylindrical pin and the driving device correspondingly and matched with the third cylindrical pin and the fourth cylindrical pin correspondingly.