This mechanical exoskeleton suit adopts precise mechanical transmission linkage combined with intelligent sensor control unit, forming a stable bionic mechanical structure that closely follows human leg movement tracks. It provides effective mechanical auxiliary force during mountain hiking, long-distance field travel and heavy load transportation, which can greatly reduce the pressure on knees and lumbar muscles and delay physical fatigue. The whole set of mechanical exoskeleton suit is made of high-strength lightweight composite materials, with IP54 dustproof and waterproof sealing design to adapt to high temperature, low temperature, humid and dusty outdoor complex environments. Equipped with flexible adjustable binding parts and replaceable high-capacity batteries, it supports quick wearing and disassembly and long-time continuous outdoor use. Suitable for outdoor explorers, field workers and users with insufficient lower limb strength, this mechanical exoskeleton suit realizes efficient human-machine coordination and effectively breaks the physical limits of long-distance movement.