Pre-twisted type optical cable strain clamp

The utility model provides a pre-twisted type optical cable strain clamp which is in a double-layer structure comprising a pre-twisted wire inner layer (3) and a pre-twisted wire outer layer (2), wherein the twisting directions of the pre-twisted wire inner layer (3) and the pre-twisted wire outer layer (2) are opposite. With the adoption of a double-layer pre-twisted wire reverse acting spiral winding structure, when an installation part is stressed, rotating torques generated by inner and outer layers of twisted wires are opposite and can be mutually cancelled out, so that a circular structure of an optical cable can be better protected; and therefore, an optical fiber of the optical cable can be better prevented from being crushed and damaged while ensuring the grip strength of a product.