Considering the fact that high arch dams have problems such as complicated stress,high cost,and hazards after being damaged,this paper intends to study the effects of load,material strength,and safety analysis method on dam safety and working performance of arch dams.In this article,the effects of temperature,self weight exaction way and water loading on structure response are first discussed,and a more reasonable way of considering is then put forward.By taking into consideration the mechanical property of materials and comparing the effects of different yield criteria on overloading safety of high arch dams,this paper concludes that brittle characteristics of concrete should be fully considered when conducting safety assessment for high arch dams to avoid overestimating the bearing capacity of the dams.By comparing several typical projects,this paper works out a safety assessment system of multiple safety and relevant engineering analogical analysis methods,which is closer to the actual situation,and thus is able to assess the response of high arch dam structure in a more comprehensive way,elicit the safety coefficients in different situations,and provide a new way of considering the safety assessment of high arch dams. Considering the fact that high arch dams have problems such as complicated stress, high cost, and hazards after being damaged, this paper intends to study the effects of load, material strength, and safety analysis method on dam safety and working performance of arch dams. In this article, the effects of temperature, self weight exaction way and water loading on structure response are first discussed, and a more reasonable way of considering is then put forward.By taking into consideration the mechanical property of materials and comparing the effects of different yield criteria on overloading safety of high arch dams, this paper concludes that brittle characteristics of concrete should be fully considered when conducting safety assessment for high arch dams to avoid overestimating the bearing capacity of the dams.By comparing several typical projects, this paper works out a safety assessment system of multiple safety and relevant engineering analogical analysis methods, which is closer to the act ual situation, and thus is able to assess the response of high arch dam structure in a more comprehensive way, elicit the safety coefficients in different situations, and provide a new way of considering the safety assessment of high arch dams.