Block generation difficulty adjusting method and device in block chain, equipment and medium

The invention discloses a block generation difficulty adjustment method and device in a block chain, equipment and a medium, and belongs to the field of block chains. The method comprises the following steps: when a new block is generated, selecting a guide block of the new block according to a logic clock of a block in a block chain of a local node; determining a logic clock line where the new block is located based on a guiding and pointing relationship between blocks in the block chain, the logic clock line being a path pointing to the creation block along the guiding and pointing relationship; determining the block generation difficulty of the current difficulty adjustment period to which the new block belongs according to the expected single chain extension speed and the block generation difficulty and the block generation speed corresponding to the previous difficulty adjustment period in the logic clock line; in the current difficulty adjustment period, the block is generated according to the target bl