Provided is a changeable multi-function folding bike. The changeable multi-function folding bike is made through reasonable design in the size, the structure and the like to be attractive in appearance and comfortable to use under the premise of ensuring various functions. A bike body is made of light materials such as aluminum and magnesium alloy, titanium alloy and carbon fiber, small light wheels are designed into a folding type, small wheels special for shopping are additionally arranged, and baskets are made through hinge design by designing a rear basket into a folding type. Therefore, the changeable multi-function folding bike is easy to carry, assemble, disassemble, fold and refit, effort-saving and time-saving in fold, assemble and disassemble, lightweight and portable, and has the functions of being changed into a table, a chair, a shopping cart and the like under the premise of ensuring proper speed and comfortable and effort-saving riding.