The present invention is provided with a concealed embedded component, which comprises a lower main body with a cool water inlet passage, a hot water inlet passage, a mixing water passage and at least an outlet passage,; an embedded box, comprising a box body and a fixing frame covering the box body, a water testing element with the bottom surface disposed with a first passage and a second passage; the lower main body is disposed in the box body, the water testing element is disposed in the box body, the water testing element covers the lower main body to make the outlet passage, the mixing water passage connected to the cool water inlet passage or the hot water inlet passage. The lower main body is disposed in the box body to be separated from the concrete, it is convenient to disassemble for maintenance.