The utility model discloses a test device of silt sludge dewatering speed under condition of many physics field, pottery buchner funnel's long -neck end passes first rubber buffer and extends to in the first mouth buchner flask of going up, be provided with silt / mud sample in pottery buchner funnel's the section of thick bamboo portion, the top layer and the bottom of silt / mud sample are provided with foraminiferous plate electrode and the foraminiferous bottom electrode board gone up respectively, still include for the loaded loading device of silt / mud sample, the first mouth buchner flask that goes up passes through mouth buchner flask and vacuum pump connection on the second. The method of silt sludge dewatering speed under many physics of test field condition is still disclosed, the utility model discloses can realize the vacuum pressure field and quiet, the dynamic pressure field of force etc. And electric coupling between fields, can convenient and fast ground not optimize the combination parameter of static pressure, vibration frequency, vacuum, voltage, electric current as evaluating indicator with dehydration speed, still available resistivity is evaluated among the native dehydration process of silt / mud or the soil structure change rule after the process.