The invention discloses a high voltage transmission line tower bird dispersing device which comprises a base. The base is fixedly fixed on the cross arm of a transmission line tower through a fixing device. The base is fixedly connected with a fixation plate. The section of the fixation plate is T-shaped. Connection seats are arranged on both ends of the cross bar of the fixation plate. A reflective ball is fixedly arranged on each connection seat. A bird dispersing prick fixing block is arranged in the middle of the cross bar of the fixation plate. A bird dispersing prick is arranged on the bird dispersing prick fixing block. According to the invention, the composite bird dispersing device with the reflective balls and the bird dispersing prick is used; the reflective balls are mainly used to disperse birds around the transmission line tower; the bird dispersing prick is mainly used to prevent birds from residing or nesting on the transmission line tower; and the high voltage transmission line tower bird dispersing device provided by the invention has the advantages of reasonable structure design, easy installation, being portable, long service life and remarkable bird dispersing effect.