The invention relates to a hook and a carriage bag hanger thereof. The hook comprises a hook body; a first slideway is installed in the hook body; a clamping plate is fixedly connected to one end of the first slideway and a slide plate is slidably installed on the other end; a first bar shaped hole is installed at the bottom of the fist slideway; a clamp block is installed in the first bar shapedhole; two ends of the clamp block pass through the first bar shaped hole and extend out; a second bar shaped hole is installed in the clamp block; a long bolt is installed in the clamping plate; the long bolt passes through the clamping plate, the second bar shaped hole and the slide plate successively; the long bolt is located in the first slideway; the long bolt is connected with the slide platein a threaded mode; a clamp hook is installed at one end of the clamp block; a clamping jaw is formed by the other end of the clamp block and the clamping plate. The structure is simple and design isreasonable; the hook is convenient and quick to clamp and mount; a hanger cover is added to the hanger body, which is safer and convenient to use; it is convenient and quick to open and close by thecover mechanism cover, and the cover is detachable, and the hook and carriage bag hanger have strong practicality.