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The Ni-Zn/basalt composite catalyst was prepared by the method of in-situ hydrothermal. The microstructure and surface element distribution of the catalyst was characterized. Taking the pine particles as raw materials and water vapor as the gasification agent, and the test system platform of the lower suction tubular gasifier was adopted. Ni-Zn/basalt composite material was studied at different temperatures of high temperature steam catalytic gasification effect. Through investigating the changes in gas composition, the variation laws of the catalytic properties of Ni-Zn/basalt composite catalyst with temperature variation were studied. The result was compared with the contrast experiments with no catalyst and dolomite as catalyst performance. The experimental results showed that Ni and Zn could be well supported on the surface of basalt fiber with the reaction temperature of 130℃ and the reaction time of 12h. Compared with no catalyst and adding dolomite catalyst, Ni-Zn/basalt composite catalyst gasification temperature at 950℃, the catalytic efficiency was improved significantly and the hydrogen volume fraction was significantly increased. The hydrogen volume fraction was increased to 63.28% while without catalyst, the hydrogen volume fraction was only 58.6% and with dolomite catalyst, the hydrogen volume fraction was 50.02%. It can be seen that Ni-Zn/basalt composite catalyst has high efficiency in the catalytic gasification reaction of pine sawdust. It can provide theoretical and experimental basis for further improving biomass gasification technology.