Multi-functional clamping device

The invention provides a multi-functional clamping device. The multi-functional clamping device includes a hand-held portion, a containing portion, a connecting portion and a clamping portion; one endof the hand-held portion is fixedly connected with the left side of the receiving portion, the containing portion is of a hollow cavity structure which is capable of containing the clamping portion,the connecting portion includes an upper-connecting piece and a lower-connecting piece, and one upper punching hole and one lower punching hole are arranged at right side of the containing portion; left ends of the upper-connecting pieces and the lower-connecting pieces separately penetrate through the two punching holes to be hinged with the containing portion through a movable pin, a compressionspring is connected between the upper-connecting piece and the lower-connecting piece, screw holes are separately arranged at the upper-connecting piece and the lower-connecting piece, and a threadedbolt penetrates through two