Liquid CO2 injection vehicle

The utility model discloses a liquid CO2 injection vehicle and relates to the field of CO2 flooding in the oil field. The liquid CO2 injection vehicle comprises a chassis and an auxiliary frame, wherein the auxiliary frame is sequentially provided with a frequency conversion control cabinet, a transfer case, a mechanical control cabinet, a motor, a three-cylinder plunger pump and a gas-liquid separator from beginning to end; a chassis engine is connected with the power input end of a full-power power takeoff device through a transmission shaft; the full-power power takeoff device and a power output shaft of the motor are connected with the power input shaft of the transfer case through the transmission shaft; and the power output end of the transfer case is connected with the power end of the three-cylinder plunger pump through the transmission shaft. According to the liquid CO2 injection vehicle, the engine and the motor are taken as power sources, the motor frequency and the engine threshold are adjusted th