Disclosed is a lower-limb exoskeleton system with a jump-down buffering function, the system comprising a back frame (1), hip joint movement mechanisms (2), telescopic thigh rods (7), knee joint movement mechanisms (4), shank rods (8), foot jump-down buffering mechanisms (5), a waist fastening frame (6), upper leg-fastening frames (3) and lower leg-fastening frames (17), wherein protruding ends on two sides of the back frame (1) are connected to one end of each of the telescopic thigh rods (7) by means of the hip joint movement mechanisms (2)； the other ends of the telescopic thigh rods (7) are connected to one end of each of the shank rods (8) by means of the knee joint movement mechanisms (4)； the other ends of the shank rods (8) are connected to the foot jump-down buffering mechanisms (5)； the waist fastening frame (6) is arranged on an inner side of a horizontal portion of the back frame (1)； and the telescopic thigh rods (7) and the shank rods (8) are respectively provided with the upper leg-fastening frames (3) and the lower leg-fastening frames (17). Based on an instruction given by a wearer when jumping down, the lower-limb exoskeleton system with a jump-down buffering function provides a buffering function to counter the force of the ground, such that the lower limbs of the wearer are not injured when same jumps down onto the ground.L'invention concerne un système d'exosquelette de membre inférieur ayant une fonction d'amortissement de saut vers le bas, le système comprenant un cadre arrière (1), des mécanismes de déplacement d'articulation de hanche (2), des tiges de cuisse télescopiques (7), des mécanismes de mouvement d'articulation de genou (4), des tiges de jambe (8), des mécanismes d'amortissement de saut vers le bas du pied (5), un cadre de fixation de la taille (6), des cadres de fixation de jambe supérieure (3) et des cadres de fixation de jambe inférieure (17). Des extrémités saillantes sur deux côtés du cadre arrière (1) sont reliés à une extrémi
