Novel cast-in-place mold

The utility model discloses a novel cast-in-place die which comprises a die body, a cavity used for pouring is formed in the die body, flange pieces are arranged on the upper end face and the lower end face of the die body, a plurality of stepped holes are annularly formed in the end faces of the flange pieces, annular sealing grooves are formed in the end faces of the flange pieces, and the stepped holes are communicated with the sealing grooves. The sealing groove is located in the inner side of the stepped hole. When the upper die body and the lower die body are assembled, double-end bolts are assembled through the stepped holes, the upper die body and the lower die body are combined with large hole positions of the stepped holes, a sealing gasket ring made of rubber is assembled after combination, the upper flange piece and the lower flange piece are combined to extrude the sealing gasket ring, the double-end bolts penetrate through the sealing gasket ring, and the double-end bolts penetrate through the s