The invention relates to an auxiliary chair, in particular to an infusion auxiliary chair for medical pediatrics. The infusion auxiliary chair for medical pediatrics can automatically clamp the hand of a child and limit the body of the child, and is easy and convenient to operate. The infusion auxiliary chair for medical pediatrics comprises bases, guide rods and first springs, the two bases are each provided with the two guide rods, a supporting mechanism is connected between the four guide rods in a sliding mode, the four guide rods are wound with the first springs, the tops of the first springs are connected with the supporting mechanism, the bottoms of the first springs are connected with the bases, and a translation mechanism is arranged on the supporting mechanism. According to the chair, the auxiliary mechanism is arranged, the translation mechanism operates to drive the auxiliary mechanism to operate, then the clamping mechanism operates, the hand of a child is clamped, the automatic clamping effect is achieved, the limiting mechanism is arranged, a nurse operates the limiting mechanism, then the child is limited, and therefore the child can be prevented from sliding off from the second bottom plate during infusion.