The invention provides an acid fluid shearing system embedded in an acid-etched fracture flow conducting instrument. The system comprises an acid filling constant-flux pump and a flow conducting chamber, wherein an acid fluid shearing device is communicated between the acid filling constant-flux pump and the flow conducting chamber through a pipeline and comprises shearing coiled pipes, inlet pipelines and outlet pipelines of the shearing coiled pipes are communicated with the pipeline between the acid filling constant-flux pump and the flow conducting chamber, a first valve is arranged on a pipeline between an inlet and an outlet of each shearing coiled pipe, a second valve is arranged on the inlet pipeline of each shearing coiled pipe, and a third valve is arranged on the outlet pipeline of each shearing coiled pipe. On the basis of a conventional acid-etched fracture flow conducting instrument, the acid fluid shearing device is added, so that an acid fluid enters the flow conducting chamber after being sheared and transferred, and finally, the measurement experiment of acid-etched fracture conductivity is completed. Fracturing of a tubular pile and simulation correction of shearing performance of the acid fluid by means of a perforating hole are realized, the experiment result of acid-etched fracture flow conducting is more accurate, and guiding significance is provided for engineering operation.