The paper describes the hydropyrolysis (HyPy) of Hongmiao lignite, performed at 450-650°C and pressure from 2 MPa to 5 MPa in a fixed-bed reactor. Effects of various parameters including temperature, pressure, gas velocity, heating rate, resistance time on product yields were studied. The effects of mass transfer were also discussed. Increased conversions and tar yields were observed with increasing temperature, hydrogen pressure and gas velocity, but decreased with increasing heating rate. Adequate residence time in maximum reaction temperature could increase the conversions and tar yields, while too long residence time had little effect on tar yields. Below a definite temperature, the higher the temperature was, the more the water formed, while above this point the water yields almost remained constant. All these results suggest that apart from the reaction temperature, other dominant factors to affect the product yields during HyPy of coal are the secondary reactions of the primary volatiles before escaping from the coal particles as well as vapour phase. In addition, they also prove that HyPy in fixed-bed reactor is more subject to mass transfer limitation.