The invention discloses a testing terminal for a rheological secondary loop. The testing terminal comprises a plurality of sets of terminal bases, a plurality of sets of connecting pieces and a plurality of coupling nuts. In the normal operation, each set of connecting pieces is connected to the corresponding set of terminal bases, when short connection is required, one connecting piece in each set is pulled out to be inserted in one base blind hole in the next set of bases, the sequential analogy is carried out to form the short connection of the whole rheological testing terminal, and therefore secondary security measures on a related loop between an overhauling device and an operation device can be completed. By the adoption of the testing terminal, the operation behavior is standardized, the working efficiency is improved, and meanwhile the probability of risk occurrences is reduced.