The invention discloses an integral compartment structure liquid propellant conveying device, and relates to the field of pressurizing conveying systems. A storage box shell is a shell structure of the liquid propellant conveying device. A first partition plate and a second partition plate are fixedly installed in the storage box shell in the radial direction. A pressurizing air inlet and a pressurizing air outlet are formed in the two ends of an energy dissipation air guiding groove. An anti-swing baffle is fixedly arranged in an inner cavity of the storage box shell. Baffle one-way valves are fixedly arranged on the lower end side wall of the first partition plate and the lower end side wall of the second partition plate correspondingly. A flow guiding channel parallel to the first partition plate is arranged on one side of the first partition plate. A flow guiding channel parallel to the second partition plate is arranged on one side of the second partition plate. An oil outlet pipeline is fixedly arranged on the inner side wall of the lower end of the storage box shell and stretches out of the storage box shell. A swinging liquid collector is vertically and fixedly arranged at the end, located in the storage box shell, of the oil outlet pipeline. According to the integral compartment structure liquid propellant conveying device, the work process is simplified, a storage box is simple in structure, and the system mass and volume are reduced.