The utility model relates to a testing arrangement for evaluating spontaneous imbibition ability of detritus matrix, its characterized in that, this testing arrangement sets up in closed chamber, and closed chamber's a side sets up an opening, and the opening part sets up an one way check valve, equilibrium pressure liquid container and matrix container intercommunication, and the intercommunication department of equilibrium pressure liquid container and matrix container sets up an ionic membrane, be full of deionized water in the matrix container, the pipe soaks in the matrix container, and the pipe is used for holding the detritus, and the both ends of pipe are provided with the gauze that prevents the detritus and reveal respectively, two sense terminals of conductivity meter set up respectively in the pipe both sides, electronic balance is used for hanging measuring catheter's quality, electronic balance linked computers, temperature sensor, humidity transducer and pressure sensor be fixed the setting in closed chamber respectively, and temperature sensor, humidity transducer and pressure sensor difference linked computers.