Safety belt having self locking device

The utility model relates to a self locking device with safety belts, which used for up and down climbing a wire pole. The middle section of a main connecting belt respectively passes through a long hole on one side of two loosing and tightening locks, and both ends of the main connecting belt are respectively and fixedly connected with both sides of a human body fixing belt. A long hole arranged on the other side of the loosing and tightening lock is respectively and fixedly connected with both ends of a wire pole fixing belt. When the utility model is used, the human body fixing belt is fixedly fasten with a human body and the wire pole is wound circularly by the wire pole fixing belt so that the wire pole is tightly fastened and locked with the wire pole fixing belt. When both hands hold and nip a lock axle engaging and disengaging operating handle of the loosing and tightening lock, the wire pole fixing belt the can be loosened and can optionally slide along the wire pole, and thus, an operating staff freely climbs the wire pole up and down. Once the human body falls down, the safety belts can be automatically tightly locked on the wire pole, and the human body can not drop down, and thus, the personal safety can be ensured at the maximum level. Compared with the traditional safety belts, the utility model has the advantages of simple structure, fair price and convenient and reliable operation. In addition, the utility model provides a great breakthrough of the innovation safety belts, a great contribution for safe operation and a gospel for workers.