A novel fabrication method for corrugated long-period fiber gratings (CLPFG) is presented in this study. The patterned SU-8 photoresist is used as a double-side stopper layer for a wet-etching process to fabricate the CLPFG. Presented in this research are four types of CLPFG with periods of 660, 670, 680, and 690 µm and resonant wavelengths of 1531, 1539, 1550, and 1558 nm, respectively. The maximum resonance loss of the CLPFG with a 680-µm period is 23 dB. The CLPFG fabricated in this study is demonstrated for temperature sensing, and the results illustrate that the fabricated CLPFG with a 680-µm period has a temperature sensitivity of 58.4 pm/°C, a wavelength-shifting linearity of R2=0.994, and a 0.856 °C resolution.