Wireless power transmission device

A wireless power transmission device (3) includes a main body (311) and a position-limiting plate (62). The main body (311) includes a triggering button (615). The triggering button (615) is disposed on a first side of the main body (311). The position-limiting plate (62) is located at a second side of the main body (311) and is movable relative to the main body (311). When an electronic device (4) is placed on the main body (311) thetriggering button (615) issues an enabling signal to the position-limiting plate (62). In response to said signal the position-limiting plate (62) is moved toward the main body (311) in order to fix the electronic device (4) on the said enabling signal is received by said position-limiting plate (62), said position-limiting plate (62) is moved toward said main body (311), in order to fix the electronic device (4) on the main body (311). I case that the triggering button (615) stops issuing said enabling signal, said position-limiting plate (62) is moved away from said main body (311) and separated from said electronic device (4).