The safety of power system is greatly influenced by proper operation of power strapwhile reliable condition monitoring is a serious constraint to the intelligentization of power strap.In this paperthe reflective optical fiber sensor is successfully used to monitor and identify the condition of power strap.Anti-misoperation of power strap is added to traditional mistake precaution system without any changes and typical operation rules of power strap are summarized.A whole mistake precaution solution to both primary equipment and secondary equipment is obtainedand thus the online condition monitoring and anti-misoperation of power strap are realizedand the safety level of power system is improved.