Novel ankle protector with tightness adjusted by knob

The novel ankle protector comprises an ankle protector body, the lower end of the ankle protector body is in a funnel shape, an opening is reserved at the lower end of the ankle protector body, an adjusting knob and a retaining ring are arranged on the ankle protector body, the adjusting knob and the retaining ring are symmetrically arranged, an adjusting belt is further arranged on the ankle protector body, and the adjusting belt is arranged on the ankle protector body. The adjusting knob is connected with an elastic rope, the adjusting belt penetrates through the retaining ring and then is connected with the elastic rope, and the adjusting belt is in a right-angle shape. Stable pressure can be provided for the ankle protector, the tensioning effect is improved, the adjusting knob is a one-way adjusting knob, and the situation that the best adjusting belt tightness is affected due to the fact that human muscles conduct contraction and expansion actions can be effectively prevented. 本实用新型公开了一种新型旋钮调节松紧的护脚踝，包括护