The invention discloses a simulation liquid long distance pipeline closed transport experiment device comprising two parts of a basic hydraulic process system and a pipeline monitoring system of a simulation oil long distance pipeline. The basic hydraulic process system comprises a long distance experiment pipeline, a liquid storage tank, an air storage tank, an air compressor and four simulation pump stations. Each station is internally provided with two centrifugal water pumps which can be connected in series or parallel for operation, and one of the pumps is a variable-frequency speed regulating pump. The pipeline monitoring system comprises automatic instruments which are installed on the simulation pump stations and the pipeline, a pump station control cabinet, a central control computer and a communication network. The device is used for simulating the hydraulic process characteristics of the oil long distance transport pipeline under different working conditions and simulating the control mode and operation of the control system of the long distance oil transport pipeline. The pipeline transport process and operation control are integrated by the device by closely combining the actual field situation so that the device has the characteristics of being reasonable in structure, substantial in content, advanced in equipment and safe and environment-friendly.