Due to the particularity of power monitoring system, power communication and data network, the civil public communication information network is difficult to meet the requirements, so the construction of power wireless private network becomes increasingly important. In order to ensure that the power wireless private network can continue to provide basic services in the complex electromagnetic environment, anti-interference measures need to be considered. Therefore, this paper proposes an EMI suppression method based on independent component analysis algorithm for power wireless private network. This method first separates the background noise, then detects the EMI, and finally suppresses the EMI, and verifies the effectiveness of the method through experiments.