Abstract: The maximum subsidence of goaf was forecast by ELM arithmetic that introduced ReLU function core and Relief Algorithm.First,stratum movement data were filtrate based on relief Algorithm,and then hidden layers number of ELM forecast model with higher forecast precision was picked by circulation experiment of hidden layer number,and the picked parameters were input,ELM forecast model for the maximum subsidence was built,which based on ReLU function core,igmoid function core, Radial basis function core and Hardlim function core,at the last,the forecast results of the four model were contrastive analysis.The results showed that relationship between mining thickness,mean mining depth,strike length, dip length and the maximum subsidence was obviously,and ELM forecast results precision was better than others,which core was ReLU function and hidden layers nerve cell was 57.