Abstract: The construction land index transaction supervision mechanism can effectively solve the problem of "malfunction" and abuse of government power in the index market of construction land. At present, there are some problems such as the rigidity of price supervision, the abuse of government authority and the lack of self-discipline supervision mechanism existing in this system. Measures should be taken to regulate the price of construction land index by directing prices rather than monopoly prices, strictly limit the government's authority to the lowest price of the construction land index, trading volume supervision. Self-regulation model should be introduced to achieve construction land index transaction supervision mechanism.