"用拼花图案装饰" can be translated into English as "decorate with mosaic patterns" or "adorn with parquetry designs" (depending on the context; "mosaic patterns" is more commonly used for general decorative patterns made of small pieces, while "parquetry designs" specifically refers to patterns created with wood pieces in flooring or woodwork).
For a more general and commonly used expression, "decorate with mosaic patterns" would be a suitable choice.