The invention discloses an automatic hot-press device for a multilayer PCB. The automatic hot-press device comprises a foundation, a working table, a first servo motor, a first bracket, a first air cylinder, a pull and pressure sensor, a hot-press head, a lower die, a heating assembly, a feeding and discharging mechanical arm, a base, a second servo motor, a gear, a slewing bearing, a rotating platform, material bins and a controller. When the automatic hot-press device works, the controller controls the feeding and discharging mechanical arm to suck raw materials in the material bins through a sucker and put the raw materials into the lower die, the second servo motor drives the rotating platform to rotate, the feeding and discharging mechanical arm sucks the raw materials in the corresponding material bins through the sucker and put the raw materials into the lower die, the steps are repeated until the raw materials of the PCB are sequentially stacked, and the first air cylinder drives the hot-press head to compact the raw materials. The device is simple in structure, hot press of the multilayer PCB is completed automatically through program control, the production process is simple, and the PCB obtained after press connection is high in precision and firm in press connection; in addition, the labor intensity of operation personnel is greatly relieved, and the production efficiency is improved.