Lightning protection device for blade tips of blades of wind power generator

The invention discloses a lightning protection device for blade tips of blades of a wind power generator. The lightning protection device comprises the blades. The outer side of each blade is sleevedwith a protecting sleeve. A protecting groove is formed in each protecting sleeve. Each blade is matched with the corresponding protecting groove. Multiple lightning receiving rods are uniformly arranged on the top side of each protecting sleeve. A protecting shell is arranged on one side of each protecting sleeve. A rectangular rod is installed on each protecting shell in a sliding manner. A tension spring is welded to one end, extending into the corresponding protecting shell, of each rectangular rod. Four stabilizing blocks are welded to the bottom of each tension spring. Four stabilizing holes are formed in each protecting sleeve. Each blade is provided with four blade holes. The four stabilizing holes and the four blade holes are arranged correspondingly. The four stabilizing blocks penetrate through the four