In the construction work of transmission lines

the sag calculation data is numerous

the process is cumbersome

and it is very error-prone. The sag is an important technical index in the line construction

and the error must be controlled within the scope allowed by the regulations. Therefore

based on the latest technology for developing application systems by Tencent so WeChat platform—the WeChat mini program

the paper researches and develops the "lineworker calculator"mobile phone software for sag real-time calculationon the spot

and carries out on-site application in several engineering constructions which achieves good results.The software is convenient and fast

which ensures the accuracy of the calculation results

and significantly improves the construction efficiency.