The utility model relates to a device used for power supply, and particularly relates to a variable-direction live wire clamp for performing downlink wire leading on a power supply main wire under the power-on state. The variable-direction live wire clamp comprises a main wire clamp part and a lead wire clamp art. The variable-direction live wire clamp is characterized in that the main wire clamp part and the lead wire clamp part are identical in structure and respectively comprise an L-shaped wire clamp plate. The top end of the L-shaped wire clamp plate bends to the internal side so that a wire slot pointing to the downward side is formed. A locking bolt penetrates through the horizontal plate of the L-shaped wire clamp plate and is matched with the horizontal plate via threads. The top part of the locking bolt is provided with a clamping head. The vertical plate of the L-shaped wire clamp plate of the main wire clamp part and the vertical plate of the L-shaped wire clamp plate of the lead wire clamp part are fit and fixed, and an inclined angle is enabled to be formed between the vertical plate of lead wire clamp part and the vertical plate of the main wire clamp part. The wire clamp is reasonable in structure, easy and convenient to manufacture and convenient and safe to operate.