Abstract: From the open investigation and laboratory analysis, this paper studied the vegetation state and soil enzyme activities of copper tailing yard of Tongguan mountain. The results showed that there were 34 species of natural colonized plants on copper tailing yard, subordinated to 16 families and 33 genera, and regard herbs as principle, and many for 1～2 years old. The main families were compositae (10 species), gramineae (9 species) and legumineceae (2 species). Hippochaete ramosissimwn, which belonged to equisetaceae, had an significant dominant.There were some microcoenses such as Hippochaete ramosissimwn+ Imperata cylindraca community, Cynodon dactylon +Imperata cylindraca community and Phragmites australis community. But, the vegetation on copper tailing yard was distributed in spot piece and scattered mainly with single species .The activities of three soil enzymes had a stronger sensitivity to the vegetation state, and their relativity to the vegetation state was in order of urease >sucrase >catalase. It's suggested that urease activity could be used as an indicator index for the reclamation of wasteland.