Provided is a sensitivity training device for children's joints. The device is characterized in that first grid gauze is fixed on four edges of a rectangular frame, the first grid gauze covers the rectangular frame and is tightened on the rectangular frame, and the four corners of the rectangular frame are fixedly connected with four supporting columns respectively. The sensitivity training devicefor the children's joints can perform exercise function training for children, wherein the exercise function training comprises balance capacity training, limb coordination training, nervous system reaction training, sense system reaction training, musculoskeletal system function training and joint coordination and agility training. The sensitivity training device for the children's joints has the advantages that the cost is low, the efficiency is high, and the exercise function training is combined with recreational games, thereby not only training the exercise function of children, but alsotraining the team-work ability.