For solving the market of purified industrial Salt,Tianjin Changlu Hangu Salt Works cooperated with Bohai Tianhua Co.,Ltd,to seek the improving measurement of technic of purified industrial salt.By researching and demonstrating in Taiyuan chemical factory,the improved technic of purification of salty water was implemented in Bohai Tianhua Co.,Ltd.The result shows that there is a good market for purified industrial salt.