The invention discloses a portable multifunctional integrated device for realizing life support and first aid functions, and belongs to the technical field of medical equipment. The portable multifunctional integrated device comprises an integrated shell, wherein a breathing function module, an electrocardiogram monitoring module, an infusion function module, a display screen assembly, an alarm assembly, a power supply module and a plurality of interfaces which are connected with a main control module are arranged in the integrated shell; the display screen assembly comprises a touch display screen; the alarm assembly comprises a sound alarm assembly and a light alarm assembly; the power supply module comprises a power supply module, a built-in battery and a direct current filter; the interfaces comprise a serial communication interface, an RJ45 interface, a USB interface, a power supply interface and a grounding interface; a telescopic handle is arranged at the top of the integrated shell; and rubber angle beads are arranged at the corners of the integrated shell. The portable multifunctional integrated device is small in size and compact in structure, integrates the functions of on-site first aid of wounded personnel and uninterrupted treatment in the transportation process, is equivalent to a portable ICU, is very suitable for being used in extreme regions and narrow spaces, and can realize the effects of life support and first aid.