Ultrasonic welding head and welding equipment

An ultrasonic welding head (100) comprises a welding face (10), a side face (20) and a connecting face (30), the welding face is provided with first welding teeth (50), the first welding teeth are used for welding a to-be-welded part (201), the extension direction of the side face intersects the extension direction of the welding face, and the connecting face is connected with the welding face and the side face to form an avoiding space (400) to avoid the to-be-welded part. According to the ultrasonic welding head, the connecting surface is arranged between the welding surface and the side surface, so that the contact area between the ultrasonic welding head and the to-be-welded part is reduced, the friction force of a non-welding area is reduced, the undesirable phenomena such as breakage or cracking of the welded part are improved, and the welding quality is improved. The invention also relates to a welding device (1000).