The invention discloses a convenient and practical connecting valve which comprises a valve body, wherein water pipe grooves and blind holes are sequentially formed inside the valve body from left to right; the water pipe grooves are communicated with the blind holes; a common water faucet connecting tank and a spare water faucet connecting tank are sequentially formed in the top of the valve body from left to right; both the common water faucet connecting tank and the spare water faucet connecting tank are communicated with the blind holes; the top and bottom of the inner wall of the blind holes are fixedly connected with a limiting block; and the limiting block is positioned between the common water faucet connecting tank and the spare water faucet connecting tank. According to the convenient and practical connecting valve disclosed by the invention, when a common water faucet plug is mounted on a common water faucet connecting seat, a user does not need to immediately replace the common water faucet, the current operating stability of the user is guaranteed, continuous usage of water body is also guaranteed, a water body cutoff phenomenon is avoided, the connecting valve is high in applicability, high in reliability, convenient and practical, and the burden of the user is reduced.