Frequency doubling pulse laser around 532 nm was obtained through irradiating periodically poled lithium niobate (PPLN) crystal with a single mode laser beam, which emitting from a Yb-doped mode-locked fiber laser. Based on quasi-phase matching technology, the second harmonic generation (SHG) wavelength tuning can be realized by changing incident angle of fundamental wave that irradiates PPLN. Pumped by a mode-locked fiber laser which has a bandwidth of 60 nm, the pulse laser SHG was obtained from PPLN, and the output laser has a bandwidth of 1.5 nm and center wavelength of 532 nm. The SHG wavelength was continuously detuned by adjusting the angle of PPLN crystal. It worked out an angle tuning range of 0° to 25°, corresponding to the SHG wavelength tuning from 531.8 nm to 535.6 nm. The wavelength detuning is in good agreement with the theoretical analysis.