Adjusting arm capable of prolonging service life of spring

The utility model discloses an adjusting arm capable of prolonging the service life of a spring, and relates to the field of adjusting arms. An adjusting arm capable of prolonging the service life of a spring comprises an adjusting arm body, an extrusion spring, an extrusion marble and a locking bolt and further comprises a sealing mechanism, the extrusion spring is arranged in the adjusting arm body, the extrusion spring is arranged at the top of the extrusion spring, the locking bolt is installed in the adjusting arm body in a threaded mode, and the sealing mechanism is arranged on the locking bolt. And a sealing mechanism is arranged on the surface of the locking bolt. By means of the sealing mechanism, the locking bolt on the surface of the adjusting arm is used for locking on one hand and sealing on the other hand, the locking bolt needs to be tightened in order to guarantee the sealing performance, so that the sealing spring is in a compressed state all the time, and the sealing effect is improved. And