Metal-oxide based electronics synapse is promising for future neuromorphic computation application due to its simple structure and fabfriendly materials. Hf Oxresistive switching memory has been demonstrated superior performance such as high speed, low voltage, robust reliability, excellent repeatability, and so on. In this work, the Hf Oxsynaptic device was investigated based on its resistive switching phenomenon. Hf Oxresistive switching device with different electrodes and dopants were fabricated. Ti N/Gd:Hf Ox/Pt stack exhibited the best synaptic performance, including controllable multilevel ability and low training energy consumption. The training schemes for memory and forgetting were developed. Metal-oxide based electronics synapse is promising for future neuromorphic computation application to to simple structure and fabfriendly materials. Hf Oxresistive switching memory has been demonstrated superior performance such as high speed, low voltage, robust reliability, excellent repeatability, and so on. In this work, the Hf Oxsynaptic device was investigated based on its resistive switching phenomenon. Hf Oxysistive switching device with different electrodes and dopants were fabricated. Ti N / Gd: Hf Ox / Pt stack exhibits the best synaptic performance, including controllable multilevel ability and low training energy consumption. The training schemes for memory and forgetting were developed.