BACKGROUND: Rwanda implemented post-natal care home visits by maternal community health workers (M-CHWs) in charge of maternal and newborn health care in 2010 as a component of a home-based maternal and neonatal health care package (HB-MNHCP), this being a complementary strategy to facility-based postnatal care to improve survival. The country has not met its Sustainable Development Goal (SDG) 3 target of less than 70 maternal mortalities per 100,000 live births and less than 12 neonatal deaths per 1,000 live births. This study therefore aimed to establish the knowledge of the health providers, providing HB-MNHC services as part of their antenatal, delivery and postnatal care program, specifically the M-CHWs services. METHODS: The cross-sectional descriptive study included 79 purposively sampled health care providers who were directly involved in the various components of the HB-MNHCP, namely: professional nurses, midwives, M-CHW, social workers, supervisors and data managers. The Kibogora, Muhima and Nyamata District Hospitals and two rural, semi-urban and urban health facility were included. Data was collected using questionnaires from April to July 2018. This study followed the STROBE checklist form: Cross -sectional studies. RESULTS: Overall, 88.6% (n=70/79) of participants knew about the M-CHW three home visits scheduled during pregnancy, 73.4% (n=58/79) about the three postnatal home visits after birth when the weight was normal, and 64.6% (n=51/79) about the five PNC home visits for low birth weights. Most (97.5%, n=77/79) knew that the mother and newborn should be screened during the same M-CHW home visits, and 87.2% (n= 68/79) were aware of the seven postnatal core competencies of delivering key maternal and newborn interventions during PNC home visits. CONCLUSIONS: There were varying levels of knowledge among the HB-MNHCP staff, indicating the need for ongoing monitoring and training to ensure that the correct information is provided to the mothers throughout the antenatal and postnatal periods. While most of the M-CHWs appear to have had the correct knowledge, their executing of some activities needs to be monitored to ensure that they provide the required services, as this is an important step in lowering the maternal and infant mortality and enabling Rwanda to meet its SDG 3. Home visits by the M-CHWs could increase referrals and reduce maternal and newborn mortality.