The invention relates to a gas filled tank and a side-protruding bus sleeve module therefrom. The side-protruding bus sleeve module includes a bus sleeve and a conductive member which is disposed inside the bus sleeve. The external periphery of the bus sleeve extends in the axis direction of the bus sleeve to form an umbrella skirt. The umbrella skirt has an avoiding part which is used to avoid the motion space of flexible connection of a 3 position switchgear. The umbrella skirt is configured such that the creepage distance between the conductive member and a tank body can be increased so as to ensure insulating properties between the side-protruding bus sleeve module and the tank body. Further, the avoiding part of the umbrella skirt enables the flexible connection below the module to follow the motion space for the 3 position switchgear to move, therefore obviating the need for increasing extra size for the cabinet and increasing the utilization of inner space of the tank body.