The invention provides a walking assisting machine for lower limb fracture of orthopedics of a traditional Chinese medicine theory. The walking assisting machine comprises the following structure thatthe upper end of a lower limb fixing sleeve is hinged to the lower end of an upper supporting rod, a plurality of upper fastening sleeves are fixedly connected to the upper supporting rod, and an upper bundling band is arranged on each upper fastening sleeve; a plurality of connecting frames are fixedly connected to the lower limb fixing sleeve, and a lower bundling band is fixedly connected to each connecting frame; a connecting rod is fixedly connected to the lower end of the lower limb fixing sleeve, and a plurality of clamping grooves are uniformly distributed in the inner side surface ofthe connecting rod; and a positioning block which extends into the clamping grooves is fixedly connected to the lower end of a fastening pin, the fastening pin is fixed to the upper end of the fixingsleeve, and a spring sleeves the fastening pin. According to the walking assisting machine disclosed by the invention, when a pedal is about to disengage from the floor, the knee bending action of aperson in the walking course is simulated, the knee bending action is automatically completed, preparation is done for next-time striding, the adverse influence that the muscle of a patient under theknee puts forth strength in the knee bending course so that pain is caused and fracture parts are stressed can be avoided, and the walking assisting machine has the characteristics of being good in protection effects and high in use safety.