The utility model provides an automatic frock that snatchs charging basket of scalable extension, including the overhead traveling crane crossbeam, pneumatic cylinder, 12 scalable hook limb, 4 grapples of grabbing, 8 pressure sensor, 14 proximity sensor, telescopic arm installs in overhead traveling crane crossbeam both sides, and at overhead traveling crane crossbeam and the scalable hook limb that grabs between I, scalable hook limb of grabbing I and the scalable hook limb of grabbing II and the scalable hook limb of grabbing II and the scalable hook limb that grabs connect with the pneumatic cylinder between III, realize grabbing the flexible of hook limb, and the grapple is installed on the scalable hook limb of grabbing III, pressure sensor installs respectively on scalable hook limbof grabbing II and overhead traveling crane crossbeam, proximity sensor installs at grapple both sides, bottom and overhead traveling crane crossbeam top.