Utilizing complex inter-variable causal relationships in multivariate time-series can enhance anomaly detection.A new approach called Causality-Aware contrastive learning for Robust multivariate Time-Series (CAROTS) is proposed for MTSAD.CAROTS incorporates causality into contrastive learning by using data augmentors to obtain causality-preserving and -disturbing samples for training.Experiments on real-world and synthetic datasets show that CAROTS with causal relationships integration improves MTSAD capabilities.