A protective cover support rack for electronic devices includes at least a protective cover body, a support lid and a hinge assembly. The protective cover body has an inner rim with an annular U-shaped trough formed thereon to hold and encase the body of an electronic device, and a lower half portion to cover the back side of the electronic device. The support lid can be adjusted at an angle smaller than 360 degrees to allow users to swivel to the front side as required to protect the screen of the electronic device, or adjust to a standing position to facilitate viewing, or fold it to fully in contact with back side of the protective cover body at a storing position, or swivel to facilitate hand grasping in use.