Prestressed steel strand and prestressed steel wire mainly have the following differences: 1. Different execution standards. 2. Different shapes. Prestressed steel strand is twisted together by 3 to 12, its appearance also has threaded groove, but along with the number of different and groove number is different also, but the steel strand still can see a steel wire in each share from the appearance. The prestressed steel strand used in prestressed concrete works is generally 7 strands, and the diameter and strength of each strand are different. Its specification is expressed by strength level, number of shares, single strand diameter (or total diameter); The prestressed steel wire is a single degree of reinforcement, divided into different diameters.