Full-waveform inversion gradient field reduction method and device, medium and equipment

The invention discloses a full-waveform inversion gradient field reduction method and device, a medium and equipment. The method comprises the steps of 1, initializing a token for calculating a gradient field; 2, a plurality of nodes compete for the control right of the token; 3, the node obtaining the token control right serves as a master node, and other nodes serve as slave nodes; 4, the main node inputs updated count to the state control file, calculates and updates a gradient field, and sends a task completion instruction after updating the gradient field; and 5, when the slave node does not receive the task completion instruction, updating the counting interval time according to the state control file, judging whether the master node is abnormal or not, and when the master node is abnormal, returning to the step 2. According to the gradient field reduction method for multi-process cooperation in full-waveform inversion, when the master node is abnormal, the slave node continues to carry out gradient fie