Abstract: Because the existing methods fail to preprocess the response signal of digital power grid,resulting in inaccurate response pattern recognition results and long recognition time,an automatic recognition method of fast response pattern of digital power grid under cloud PAAS layer is proposed. Under the cloud PAAS layer,the wavelet threshold denoising method based on Bayes estimation is used to preprocess the fast response signal of power grid with noise. Set the visible layer,hidden layer and output layer of the model,calculate the weight matrix between each layer,train the preprocessed response signal,and input the trained data into the RBM model to obtain the fast response pattern recognition results of digital power grid under PAAS layer. The experimental results show that the response pattern recognition time of the proposed method is 53s,the recognition accuracy is up to 99%,the recall rate is 98%,and the F1 value is 99%.