Under-chain trusted execution method and system for block chain calculation-intensive transactions

The invention relates to an under-chain trusted execution method and system for a block chain calculation-intensive transaction. According to the method, under-chain computing nodes execute transaction computing, and a computing tree and a computing result are packaged and published to a block chain; in the publication period of the transaction result, all the computing nodes monitor and compare whether the computing result on the block chain is the same as the local result, and if not, transaction objection is initiated; the calculation result publisher receives the transaction objection information and publishes an objection variable state in a calculation tree of the calculation result publisher; the consensus node arbitrates the correctness of the specified variable state, and takes the final honest as the latest result of the transaction; and checking whether the transaction result meets a confirmation condition or not according to the availability state of the compute-intensive transaction, and discardi