Circular erosion test device for closed pipelines and using method of circular erosion test device

The invention discloses a circular erosion test device for closed pipelines. The circular erosion test device comprises a stirring device, a measuring device, a control device, a calibrating device and a pipeline device, wherein a medium is stirred in the stirring device, and then is conveyed to the measuring device for measuring through the pipeline device; the measuring device is connected with the control device; the control device is used for acquiring and adjusting the measurement data obtained by the measuring device; the calibrating device is connected with the measuring device and used for calibrating; the pipeline device comprises a stainless steel pipeline, and a to-be-tested pipeline which is a replaceable pipeline; the control device adopts a center console which comprises a data acquisition module, a temperature control module and a pressure control module. The circular erosion test device has the advantages that various factors are comprehensively considered, the actual working condition can be simulated, and the test results are more accurate.