The invention provides a fireproof door with good sealing, smoke insulation and sound insulation effects. The fireproof door comprises a door frame and a door leaf, a threshold is installed at the bottom of the door leaf, is an inflaming-retarding fire-resistant threshold and comprises a first sealing part and a second sealing part, and a sunken part is arranged between the first sealing part and the second sealing part. The door leaf is composed of two layers of door core boards, plywoods are arranged outside the door core boards, and a magnesium silicon fireproof board set is arranged between the two layers of door core plates. According to the fireproof door with the good sealing, smoke insulation and sound insulation effects, the threshold is installed at the bottom of the door leaf, and the sunken part is arranged between the first sealing part and the second sealing part of the threshold, so that the sealing, fireproof and smoke insulation effects of the fireproof door leaf are better; and the magnesium silicon fireproof board set is arranged in the door leaf, a plurality of sound absorption structures are formed in the magnesium silicon fireproof board set, each sound absorption structure can absorb noise generated by the outside world, and the noise generated by the outside world can be well absorbed, so that the purpose of noise reduction is achieved.