The invention provides a battery cover locking structure, which comprises a machine body, a battery cover and a button. The battery cover is provided with a grab. The button is provided with a fastening piece. The button comprises a pressing part and a resetting piece. The pressing part and the resetting piece are integrally formed. The resetting piece comprises an elastic part and a clamping part. The pressing part includes a bottom surface. One end of the elastic part is fixed to the bottom surface. The clamping part extends from the other end of the elastic part to be fixed onto the machine body. The resetting piece provides an elastic force to clamp the grab onto the fastening piece detachably. According to the battery cover locking structure, the battery cover is clamped and fixed on the machine body through the cooperation between the fastening piece arranged on the button and the grab arranged on the battery cover. The button can be slightly pressed to unlock and detach the battery cover.