The utility model discloses a novel on-line material sampling device which is characterized by comprising a conveying pipeline, wherein a sampling pipe is communicated with the lower part of the conveying pipeline; a sampling box body is arranged below the sampling pipe through a sampling adjustment valve; a sampling barrel is arranged at an outlet of the sampling box body; and the sampling adjustment valve is arranged between the sampling pipe and the sampling box body. According to the novel on-line material sampling device, a hydraulic end support is convenient to mount and dismount, and a closed on-line conveying material can be conveniently and efficiently extracted by the device, so that the requirements of current enterprises are better met.