1, Relationship: Western economic sanctions are the reason, the sharp drop in oil prices intensifies the depreciation trend, and the persistence of depreciation and concerns about economic prospects form a spontaneous vicious devaluation.

2. Specific links: Russia's economy is closely linked to the EU, and Western sanctions (trade, investment, economic cooperation, etc. ) make Russia's economic prospects uncertain; In addition, Russia's economic growth (GDP) depends largely on the international crude oil price, and the continuous drop of oil price to "cabbage price" has further aggravated investors' concerns; These situations are manifested in capital outflow (foreign capital flight under the condition of complete capital flow), and the demand for converting rubles into other currencies in the foreign exchange market has increased. However, because the amount of money is stable in a certain period of time, there will inevitably be an oversupply situation, and then the devaluation of the ruble is inevitable. When the situation is serious, the Russian people will also exchange the ruble into other currencies to avoid asset losses caused by the devaluation of the ruble.

3. How to do it: On the one hand, selling foreign currency means buying too many rubles in the foreign exchange market with foreign exchange reserves to curb further depreciation; On the other hand, we need to find ways to develop the internal economy, transform external demand into domestic demand, and deal with possible economic crisis.