The invention aims to provide a double-way oil inlet resonance pore plate type electronic oil injector with an engraved groove. The oil injector comprises an oil injector head, an oil injector body, a flow limiting valve assembly, a solenoid valve assembly, a needle valve assembly and a nozzle. A pressure storage cavity is formed in the oil injector body and communicates with a main oil inlet and the flow limiting valve assembly, and the stability of oil injection processes of various cylinders under the condition of the large oil injection amount is guaranteed. A resonance structure machined at the bottom of the flow limiting valve assembly reduces water impact pressure waves produced due to quick opening and closing of the oil injector. Through double-way oil inlet at a solenoid valve balancing valve rod and inside a middle block and double-way oil inlet at a pore plate throttling pore and a circular side surface oil way, the pressure building process of a control cavity is accelerated, and the response speed of needle valve seating is increased. The engraved groove with the micron-scale depth is formed in the surface of a needle valve body, the cavitation flow stability can be effectively improved, and the cavitation erosion degree of the oil injector is reduced. By the aid of the pore plate structure arranged inside the control cavity, the dynamic oil return amount in the oil injection process is greatly reduced, and the characteristic of micro-dynamic oil return is guaranteed.