Tunnel engineering is an important component part of such large-scale engineering projects as railway, highway, water conservancy and hydropower constructions. Unclear geological conditions have frequently led to considerable harmfulness caused by tunnel construction accidents. Therefore, the improvement of the advanced geological forecast for tunnel construction is very necessary. The study of tunnel seismic wave advanced forecast technology has been carried out both in China and abroad in the past several years. In this paper, the author has discussed the present situation and existent problems in this aspect, pointed out the deficiency of the TSP technology, dealt with the importance of overcoming blindness and improving scientific forecast, and described the newly-developed TGP tunnel seismic forecast system and its technology as well as its application effects.