The invention provides a portable ore pulp sampling device and a method thereof. The portable ore pulp sampling device comprises a threaded rod, a handle connected with the top of the threaded rod, a circular bottom cover connected with the bottom of the threaded rod, a conical top cover sleeving the upper end of the threaded rod, a cylindrical sampling pipe arranged between the top cover and the bottom cover, scales arranged on the sampling pipe, circular holes formed in the side adjacent to the scales, and rubber stoppers plugged in the circular holes. By virtue of cooperation of all parts of the device, the portable ore pulp sampling device can be well applied to the ore pulp sampling, and has the advantages of being convenient to operate, low in use cost, rapid and accurate to sample, quantitative and accurate to sample, extremely high in practicability, and the like.