To solve the problem of poor detection and limited application range of current intrusion detection methods

this paper attempts to use deep learning neural network technology to study a new type of intrusion detection method. Hence

we proposed an intrusion detection algorithm based on convolutional neural network (CNN) and AdaBoost algorithm. This algorithm uses CNN to extract the characteristics of network traffic data

which is particularly suitable for the analysis of continuous and classified attack data. The AdaBoost algorithm is used to classify network attack data that improved the detection effect of unbalanced data classification. We adopt the UNSW-NB15 dataset to test of this algorithm in the PyCharm environment. The results show that the detection rate of algorithm is 99.27% and the false positive rate is lower than 0.98%. Comparative analysis shows that this algorithm has advantages over existing methods in terms of detection rate and false positive rate for small proportion of attack data.