The invention discloses a multifunctional combined type environment-friendly 3D printer. According to the multifunctional combined type environment-friendly 3D printer, a 3D printer main machine is located in the center of a printer shell, a power switch, an LCD display, a temperature controller and the like are arranged outside the front surface of the printer shell; the power switch is connectedto storage batteries, the temperature controller and an electric quantity display in series; the LCD display is connected to a printer main board; the temperature controller is connected to convection fans and a heater on a printer box body; parts on the 3D printer main machine is connected to the printer main board; and feeding structures are located on the two sides of the printer and are connected to motors of printing heads in parallel. The multifunctional combined type environment-friendly 3D printer has the advantages that the operation complexity of the printer can be reduced by adopting the multifunctional combination, and the printing precision of the printer can be improved; the automatic drying and feeding function is adopted, a heat preservation box with controllable temperature and humidity is adopted, so that the printer can have the same printing working environment in different environments, and therefore printing can be insusceptible to the environment.