The invention discloses a novel letter box. The novel letter box comprises a base arranged at the bottom of the letter box, and a reminding screen used for being installed on the base. A slot is formed in the left end face of the base, a power-on sliding groove is formed in the right end wall of the slot, a power-on hole is formed in the right side of the top end wall of the power-on sliding groove, a first sliding groove is formed in the bottom end wall of the power-on sliding groove, a second sliding groove is formed in the bottom end wall of the slot, and a transverse cavity stretching rightwards is formed in the portion, below the first sliding groove, in the base. The reminding screen is firmly locked, the reminding screen is powered on safely and stably, the situation that the reminding screen is not fixed stably and firmly is avoided, dismounting, mounting and maintaining are convenient, and electric shock accidents are avoided; when a letter is put in the letter box, a pressureinductor inducts the letter and controls the reminding screen to remind that the letter exists in the letter box, a user does not need to open the letter box to confirm whether the letter exists in the letter box or not, and great convenience is brought.