A height adjustment structure of printed circuit board and the adjustment method thereof are disclosed. The height adjustment structure includes an electronic device main body, a circuit board body and an adjusting component. The electronic device main body includes at least one fixing part. The circuit board body is disposed on a surface of the electronic device main body at which the fixing part is located. The circuit board body includes at least one stuck part, wherein the stuck part is disposed along the edge of the circuit board body and corresponds to the fixing part; further, the stuck part recesses inwards into the circuit board body to form a U shape. One end of the adjusting component movably penetrates the fixing part and being screw locked thereon, and another end of the adjusting component is embedded to the stuck part.