Liquid carbon dioxide heating device in high-pressure flowing state

The utility model relates to a liquid carbon dioxide heating device in a high-pressure flowing state. The liquid carbon dioxide heating device comprises a heat exchange box body, a flow dividing and speed reducing manifold, a flow collecting and speed restoring manifold and a heat supply device, the heat exchange box body is connected with a heat supply device, the heat exchange box body is arranged between the flow division speed reduction manifold and the flow collection speed recovery manifold, the flow division speed reduction manifold is further connected with the high-low pressure manifold, the flow collection speed recovery manifold is connected with a wellhead, the high-low pressure manifold is connected with the fracturing unit, and the fracturing unit is connected with the fracturing unit. And the high-low pressure manifold is also connected with a liquid carbon dioxide storage tank through a carbon dioxide booster pump. According to the utility model, the liquid carbon dioxide can reach a supercrit