Abstract: By using Ge (Li) detector γ-spectrum method, the fission yields and fission yield ratios of 95Zr, 97Zr, "Mo, 103Ru, 131I, 132I and 140Ba of 235U induced by thermo-and fission spectrum neutrons have been measured.This method has several advantages such as high accuracy, speed, nondistortion and without chemical separation. A Ge (Li) detector with a volume of 145 cm3 and energy resolution of 2.0 keV for 1332.5 keV of 60Co was used. The powerful γ-spectrum analysis program GSAP1 was used off-line to calculate the areas of γ-peaks and compared with the result by the Golton program in on-line analysis.The calculation of errors of fission ratio, efficiency, nuclear parameters for fission yield and the corrections of dead time of system as well as self-absorption have been made. The experimental results are listed in table 1, 2 and 3.