BIKE RACK WITH POSITIONING FRAME FOLDING AND SECURING STRUCTURE

A bike rack includes a base with a U-shaped bar and a support frame. The support frame is mounted a top of the U-shaped bar. A positioning frame is pivotably connected two connection plates on the support frame. Each connection plate is connected to a limiter by a quick-release device. Each limiter includes a vertical groove and a horizontal groove. The vertical groove accommodates one of two extensions of the positioning frame when the positioning frame is positioned upright. By operating the quick-release devices, the positioning frame is either fitted in the vertical groove or the horizontal groove. The bike rack can securely fasten bicycles and is not wobble or unstable while driving.