The invention relates to a wire clamp capable of adjusting an installation direction, and belongs to the technical field of the wire clamp. The wire clamp mainly solves the technical problem that an optimal installation position cannot be realized because an installation angle of a branch wire relative to a main wire cannot be adjusted in electric power electric wire branch work. The wire clamp includes a main wire clamp and a branch wire clamp. The main wire clamp includes a main trunking, a main wire pressing plate, and a main wire connection lining. The main wire connection lining includes a main wire connection body at an upper part and a main wire connector at a lower part. The main wire connector includes a side surface connector and a bottom connector. The side surface connector includes a side shaft and a side annular clamp bulge. The bottom connector includes a bottom shaft and a bottom annular clamp bulge. The branch wire clamp includes a branch wire groove, a branch wire pressing plate, and a branch wire connection lining. The branch wire connection lining includes a lower connection plate of the branch wire connection lining, a middle connection plate of the branch wire connection lining, and an upper connection plate of the branch wire connection lining. The upper connection plate of the branch wire connection lining is provided with a branch wire connection hole and a clamp groove. According to the invention, the direction of the branch wire clamp relative to the main wire clamp can be adjustable.