The invention relates to the field of oil and gas pipelines and discloses a process pipe column for a horizontal well fluid producing profile testing technology and a flow monitoring method to solve the technical problem of low horizontal well fluid producing profile testing efficiency in the prior art. The process pipe column comprises a pump, at least two sets of test components and an electric control sliding sleeve, wherein each set of the test components include a straightening device, an electric control separator connected to the straightening device, and a tester connected to the electric control separator; every two of the at least two sets of the test components are connected through a working oil pipe; and a first end of the electric control sliding sleeve is connected to the pump and a second end of the electric control sliding sleeve is connected to the at least two sets of the test components. Through the scheme, all layers can be tested in one time after each layer section of a horizontal well fluid producing profile is segmented through the process pipe column, so that the technical effect of improving the test efficiency is achieved.