The present invention discloses an herbal medical bath cream for improving moisture retention, comprising the following raw materials: 20 to 30 parts by weight of plantain extract, 25 to 30 parts by weight of polygonum multiflorum extract, 10 to 30 parts by weight of corydalis tuber 20 parts by weight, 5 to 10 parts by weight of watermelon peel (Watermelon rind) extract and 10 to 20 parts by weight of Cheonsimnyeon (Andrographis paniculata) extract.본 발명은 하기 원료들을 포함하는 수분 유지력 개선용 한방 의료용 목욕 크림을 개시한다: 질경이(Plantain) 추출물 20 내지 30중량부, 하수오(Polygonum multiflorum) 추출물 25 내지 30중량부, 현호색(Corydalis tuber) 10 내지 20중량부, 수박 껍질(Watermelon rind) 추출물 5 내지 10중량부 및 천심련(Andrographis paniculata) 추출물 10 내지 20중량부.