The utility model relates to a vertical insulator sour jujube is detained for 10kV electric power overhead line, press from both sides two including detain pressing from both sides one, detaining, spring, hasp, silica gel circle, pivot no. 1, pivot no. 2, detain and press from both sides one and be the arc structure in the middle of pressing from both sides two with detaining, be fixed with the silica gel circle on the arc structure inner wall, detain and press from both sides two and press from both sides an one end and pass through a pivot activity hinge joint with detaining, detain and press from both sides an other end and pass through two activity hinge joint of pivot with the hasp, detain and press from both sides two other ends and be equipped with reverse sour jujube tooth, the hasp on be equipped with and detain the forward sour jujube tooth that presss from both sides two phase -matchs, hasp and knot press from both sides and are equipped with the spring between one for inject the latch position, it forms the integral type structure with the insulator to detain clamp no. 1. The advantage is: easy operation, swift is detained to the sour jujube, has improved work efficiency, reduces personnel's high altitude construction time, improves operation factor of safety, and it is better to fasten the effect. It is big, corrosion -resistant that structural strength is detained to the sour jujube, not influenced by environmental factor such as wind -force and air humidity.