The invention discloses a simulated human lower limb system on the basis of pneumatic muscles. Movement of a muscle driving hip joint, a knee joint, an ankle joint and toes of a human body is simulated by the aid of the pneumatic muscles, and movement functions of the lower limb of the human body can be completely simulated. A simulated human lower limb mainly comprises a pelvis, a femur, a fibula, a foot sole, the toes, spherical hinges, the pneumatic muscles and a pneumatic muscle fixing plate. The pneumatic muscle driving hip joint which can be used for simulating effects of gluteus maximus muscles, an adductor muscle, iliopsoas muscles, obturator internus muscles, piriformis muscles and the like rotates around a vertical axis, a sagittal axis and a coronal axis; rectus femoris muscles, rear-side muscle groups of a thigh, gracilis muscles and biceps femoris muscles drive the knee joint to rotate around the vertical axis and the coronal axis; triceps surae muscles, front group muscles and outer-side group muscles drive the ankle joint to rotate around the sagittal axis and the coronal axis; the five toes carry out flexion-extension actions under the driving effects of flexor pollicis longus muscles, extensor pollicis longus muscles, flexor digitorum longus muscles and extensor digitorum longus muscles. The simulated human lower limb system has the advantages that the simulated human lower limb system is driven by the pneumatic muscles, is compact in structure and good in explosion-proof performance, is clean and can be used for teaching and demonstration.