The invention discloses equipment used for manufacturing a PET wood-plastic composite with a sandwich structure, belongs to the field of composite preparation equipment and particularly relates to thefield of preparation equipment of PET composites. According to the equipment used for manufacturing the PET wood-plastic composite with the sandwich structure, the problems that in the background technology, strength is low, toughness is poor, and attractiveness is not achieved are solved by improving the equipment structure. The equipment used for manufacturing the PET wood-plastic composite with the sandwich structure is provided with control equipment, main extrusion equipment, auxiliary extrusion equipment and a mould head enabling the main extrusion equipment and the auxiliary extrusionequipment to be connected together. The main extrusion equipment is provided with power equipment, a transmission shaft, a machine cylinder, a heating device, a feeding hopper, a support and a platform base. The auxiliary extrusion equipment is provided with a power machine, a transmission rod, a threaded inner rod, a reaction cylinder, a heating device, an auxiliary inlet hopper and a support. The equipment is used for the field of preparation of the PET wood-plastic composites.