An all-fiberized pulsed fiber laser with high repetition rate and narrow pulse duration based on master oscillator power amplifier structure was reported. The seed source is a directly pulse driven fiber pigtailed laser diode working at 1 063 nm. To restrain the generation of amplified spontaneous emission light in the fiber amplifier, the seed is modulated to work at suitable supper Gaussian shape. The seed laser with peak power of 950 mW is amplified by two stages Yb3+ doped double cladding fibers whose core diameters are 10 μm and 30 μm. At last, the pulsed laser is obtained with an average power of 101W, a repetition rate of 200 kHz, a pulse duration of 14.77 ns, a peak power of 34.2 kW, a 3 dB spectral spectrum width of 0.261 nm and a beam quality factor M2 of 1.17. Compared with the conventional nanosecond pulsed laser, the proposed fiber laser is essential or more efficiently in many applications, such as laser radar, remote sensing, frequency doubling and optical parametric oscillator, because of its high peak power, good beam quality, narrow spectrum width and simple structure.