Abstract: The pro-hydrotreating of mid-low temperature coal tar was conducted in a magnetic-stirred autoclave to simulate the reaction situation of the slurry-bed. Using the self-designed heterogeneous catalyst LN，the effect of reaction conditions on product distribution and the conversion of toluene insoluble was explored. The results showed that the yield of light oil was improved with the increase of the temperature and the initial hydrogen pressure. At a reaction tenperature of 460 ℃, a initial pressure of hydrogen of 16.0 MPa, a addition od catalyst of 3.0 %，and a reaction time of 10 h, the yield of light oil and the conversion of toluene insoluble reached 54.21 %，86.5 %，respectively. The product distribution was significantly improved.

Key words: mid-low temperature coal tar, slurry-bed pre-hydrotreating, heterogeneous catalyst, product distribution