The invention discloses a heavy-current solid-sealed polar pole for gas-insulated switchgear. The heavy-current solid-sealed polar pole comprises an insulated sleeve, an arc extinguish chamber, and a lower wire outlet end, wherein the arc extinguish chamber and the lower wire outlet end are fixed in the insulated sleeve. The lower wire outlet end is provided with a sleeve portion in conductive connection with the lower end of the arc extinguish chamber through a flexible connection apparatus. The lower end of the sleeve portion is equipped with more than two connection positions in conductive connection with the flexible connection apparatus. Each connection position is arranged outside the periphery of the arc extinguish chamber. The connection positions of the sleeve portion of the lower wire outlet end are arranged outside the arc extinguish chamber so that a span between the lower end of the arc extinguish chamber and the connection positions of the lower wire outlet end is increased and the span of the flexible connection apparatus is increased. Thus, in a process that an insulation pull bar drives a movable-end conductive rod to move up and down, the amplitude of bent deformation of the flexible connection apparatus decreases with an increase in the span so that the fatigue damage speed of the flexible connection apparatus is reduced. Therefore, the heavy-current solid-sealed polar pole has an advantage that the flexible connection apparatus is not prone to damage and guarantees the using reliability of the whole heavy-current solid-sealed polar pole.