The invention relates to recycling equipment of oil storage tank associated gas, in particular to a recycling device of the oil storage tank associated gas. The recycling device is characterized in that the right end of a valve body (18) is communicated with a storage tank, pipelines are provided with a gas evaporation valve base (2) and a gas evaporation outlet (19) is connected with a gas evaporation compressor; the pipeline of the lower pipe body of the valve body (18) is provided with a gas supplementation valve base (3), and a gas supplementation inlet (21) is connected with a gas supplementation compressor; a valve core component (1) is arranged between the gas evaporation valve body (3) and the gas supplementation valve base (3) and is fixed up and down by a valve core centering support frame (16) on the upper pipeline and the lower pipeline inside the valve body (18); the left pipeline of the valve body (18) is connected with an actuator (15) by a lever. By adopting the structure, the recycling device of the oil storage tank associated gas has the advantages of low investment, convenient commission, stable performance, good reliability of the system and low operation cost.