Sinsing used to be called
Tāi-káng-po͘ () in early days where it was filled with endless wilderness before. During the
Japanese rule of Taiwan, residents in the area used to make a living from farming and lived a simple life. Due to the nature of agriculture industry, people deployed water conservation methods in the area, thus irrigation system was spread all over the area. Fields became fertile and they grew rice, sweet potato, sugarcane or corn. After the
handover of Taiwan from Japan to the
Republic of China in 1945, the area grew gradually and was renamed
Sinsing District. ==Administrative divisions==