The present invention discloses a forward secure editable block chain construction method suitable for consortium chains, which includes the following steps: S1, system initialization; S2, judging whether blocks need to be added, if so, enter step S3, otherwise enter step S4; S3, increase the block by obtaining the hash value; S4, judge whether the historical content on the existing block needs to be modified, if so, go to step S5, otherwise go to step S6; S5, pass the chameleon of the block to be modified The collision value of the Greek function modifies the content of the historical block on the block chain; S6, updates the secret share of the participating users of the alliance chain, and completes the forward editing of an update cycle. The present invention uses secret sharing technology to store trapdoor keys in a distributed manner. Compared with secure multi-party computing protocols, the structure of calculation collisions in the present invention not only protects trapdoor keys and secret shares from being leaked, but also has less interaction times and lower computational overhead.