Multi-device delay calibration method and device based on local area network

The invention provides a multi-device delay calibration method and device based on a local area network, which are applied to a system consisting of a control end and at least two controlled terminals, and the method comprises the following steps: step 1, the control end establishes long connection with all the controlled terminals; 2, the control end sends a delay calibration instruction to all the controlled terminals; step 3, each controlled terminal determines a respective instruction difference compensation time value according to the receiving time; and step 4, each controlled terminal performs playing adjustment according to the preset buffer time value and the respective instruction difference compensation time value so as to realize synchronous playing of all the controlled terminals. According to the invention, playing adjustment is carried out on each controlled terminal according to the preset buffer time value and the instruction compensation time value of the controlled terminal, so that synchro