The invention discloses an efficiently-mounted injection mold mechanism. The efficiently-mounted injection mold mechanism comprises a mounting plate and a mold; a mold cavity is formed in the surfaceof the mold, a mounting groove is formed in the mounting plate, the shape of the mounting groove is matched with that of the mold, the mold is mounted in the mounting groove, two long grooves are formed in the upper surface of the mounting plate, the two long grooves are symmetrical about the mounting groove, the long grooves are rectangular grooves, a plurality of through holes are formed in themounting plate and located between the long grooves and the mounting groove, one end of each through hole communicates with an inner cavity of the mounting groove, the other end of each through hole communicates with an inner cavity of the corresponding long groove, a first flange is fixedly mounted at the end opening, communicating with the corresponding long groove, of each through hole, a second flange is fixedly mounted at the end opening, communicated with the mounting groove, of each through hole, and a circle is mounted in each through hole. The efficiently-mounted injection mold mechanism has the beneficial effects that the structure is simple, and installation and dismounting are convenient and fast.