The invention discloses a 
permeation coefficient tester for an irregular sample under different 
hydraulic pressure conditions and a test method. The tester comprises a 
testbed, a sample fixing deviceand an 
electronic control system, wherein a water inlet 
pipe is connected with a filter device; an energy accumulator is arranged between a water outlet of an electric pump and a 
pipe of a water inletof a 
water storage container arranged in the middle of the 
testbed; a 
water collection container is arranged on the inner side of the 
testbed; the sample fixing device is of a double-layer structureformed by a round steel 
barrel on the outer side and a hollow rubber seal kit on the inner side; the 
electronic control system comprises solenoid valves, a flowmeter, electronic switches of the electric pump, the energy accumulator and the inflator pump as well as a control center, the solenoid valves are arranged on a water outlet 
pipe of the electric pump, an energy accumulator pipe, an inflatorpump pipe and a lower pipe of the 
water collection container, and the flowmeter is arranged in the 
water collection container. The tester can test the 
permeation coefficients of the irregular sampleunder the different 
hydraulic pressure conditions, the sample sealing performance is good, test precision is reliable, and 
automation degree is high.