By taking the power supply of Baode County in Shanxi Province for example,hourly bidding was compared with block bidding,and the operation mechanism of the block bidding market was analyzed,which including bidding process,making bidding curve,bidding rules and maeket clearing model,and the final quantitative calculation.Results showed that the price strategy of bilateral block bidding is more suitable for current power market reform,and makes the power supply in economic and technology and the interests in generation-side and demand-side ahieve double wins.