Output charactaristic of external resonator PbWO4 Raman laser excited by nanosecond pulse is studied. An actively Q-switched Nd:YAG laser is used as the pumping source, with pulse width of 31.4 ns and the maximum output energy of 200 mJ at 1064 nm. The Raman laser cavity is a flat-concave one. The relation between the pulse width of output Raman pulses and pumping energy is measured. The optical spectra and the pulse waveforms of Raman pulses are analyzed. The relation between the energy of output Raman pulses and pumping energy is measured, and the relation between the conversion efficiency and pumping energy is calculated. When the pumping energy is 42 mJ, the obtained maximum output energy and conversion efficiency of first-Stokes pulse are 10 mJ and 24%, respectively. The wavelength of the first-Stokes pulse of the Raman laser is 1177.6 nm. The typical pulse width the of the first-Stokes pulses is 20 ns.