The utility model discloses a silt test rod, this silt test rod include the body of rod, install data processing device, level sensor and pressure sensor on the body of rod, pressure sensor is locatedbody of rod bottom, data processing device is used for the basis to be in the pressure sensor injection water in -process that awaits measuring pressure sensor's penetration resistance confirms pressure sensor's position, and according to working as the pressure sensor injection extremely when awaiting measuring the mud top of water level sensor is in await measuring the water the degree of depthand work as the pressure sensor injection extremely await measuring mud when bottom of water level sensor is in the depth calculation of water awaits measuring the mud thickness of water awaits measuring. The utility model discloses compromise the dual requirement to silt thickness measurement precision and efficiency, can simplify operation procedure, reduced and equip complexity, practiced thrift the manpower and materials cost.