The invention discloses a common method of block chains dependent on the computational force of correlation chain, which relates to the field of block chain. Firstly, at least one group of service data in a first time period of the block chain network is received, and a first service hash value matched with the service data is obtained by hashing operation. Then, according to the first service hash value, a first transaction matching the first service hash value is generated and advertised on a first related block chain outside the block chain network; Then, periodically it is detected whetheror not the first transaction on the first relevant block chain is confirmed; In response to the first transaction being confirmed, transaction recording information of the first transaction is collected and recorded on a second block of the block chain network. In the invention, the block chain network relies on the calculation force of the related block chain, and only the defense calculation force attack ability of the related block chain is required to be high, so the defense calculation force attack ability of the block chain is improved, and the defense calculation force attack ability of the block chain is improved.