The utility model relates to a multifunctional casing head used when the petroleum drilling is accomplished. The multifunctional casing head comprises an upper pressing plate (4), sealing filler (5), a lower pressing plate (6), a spring (7), a two halves type bearing slip (11) and a guide temporary hole(13), wherein the sealing filler (5) is arranged between the upper pressing plate (4) and the lower pressing plate (6), a sealing pressing cover (2) is connected with the two halves type bearing slip (11) through a bolt (3), the two halves type bearing slip (11) is connected with a suspension joint (12) through a bolt (8), the spring (7) is arranged on a spring locating piece (9), and the guide temporary hole(13) is arranged on the suspension joint (12). The utility model is suitable for the fixing of various surface casing tubes and oil layer casing tubes or intermediate casing tubes and oil layer casing tubes, and enables the possible high pressure gas or liquid to be discharged through the guide temporary hole.