A fixing apparatus, comprising: a first fixing device adapted to position and fix a circuit board having at least one pad; and a second fixing device adapted to position and fix at least one wire, wherein the first fixing device comprises a first fixing base, in which a first positioning groove is formed, that is adapted to position the circuit board, and the second fixing device is formed with at least one second positioning groove adapted to position the at least one wire; and each second positioning groove is aligned with a corresponding pad on the circuit board so that the wire fixed in the second positioning groove is aligned with the corresponding pad on the circuit board, characterized in that the first fixing device further comprises: a first lock pivotally connected to a side of the first fixing base and adapted to be rotated between a locked position and the unlocked position, wherein the first lock is formed with a first locking lip extending from one end thereof and adapted to lock an edge portion of the circuit board; wherein the first lock has a connection portion pivotally connected to the first fixing base between both ends thereof; wherein the first lock is adapted to hold and lock the circuit board in the first positioning groove when being in the locking position, wherein the first fixing base is provided with a first spring adapted to push the other end of the first lock upwardly to hold the first lock in the locked position; and wherein the first fixing base is formed with a receiving slot in which the first lock and the first spring are disposed; and the connection portion of the first lock is pivotally connected to a sidewall of the receiving slot by a pivot shaft. a first fixing device adapted to position and fix a circuit board having at least one pad; and a second fixing device adapted to position and fix at least one wire, wherein the first fixing device comprises a first fixing base, in which a first positioning groove is formed, that is adapted to position the circuit board, and the second fixing device is formed with at least one second positioning groove adapted to position the at least one wire; and each second positioning groove is aligned with a corresponding pad on the circuit board so that the wire fixed in the second positioning groove is aligned with the corresponding pad on the circuit board, characterized in that the first fixing device further comprises: a first lock pivotally connected to a side of the first fixing base and adapted to be rotated between a locked position and the unlocked position, wherein the first lock is formed with a first locking lip extending from one end thereof and adapted to lock an edge portion of the circuit board; wherein the first lock has a connection portion pivotally connected to the first fixing base between both ends thereof; a first lock pivotally connected to a side of the first fixing base and adapted to be rotated between a locked position and the unlocked position, wherein the first lock is formed with a first locking lip extending from one end thereof and adapted to lock an edge portion of the circuit board; wherein the first lock has a connection portion pivotally connected to the first fixing base between both ends thereof; wherein the first lock is adapted to hold and lock the circuit board in the first positioning groove when being in the locking position, wherein the first fixing base is provided with a first spring adapted to push the other end of the first lock upwardly to hold the first lock in the locked position; and wherein the first fixing base is formed with a receiving slot in which the first lock and the first spring are disposed; and the connection portion of the first lock is pivotally connected to a sidewall of the receiving slot by a pivot shaft.