Abstract: The present invention proposes a data densifier comprising a plurality of first operation units and a second operation unit. The plurality of first operation units are respectively configured to be instantiated according to classification information, and the plurality of instantiated first operation units are configured to densify a plurality of sub data included in input data into a plurality of sub densified data. The second operation unit is configured to be instantiated according to the classification information, and the instantiated second operation unit is configured to merge the plurality of sub densified data from the plurality of first operation units into densified data. In addition, a data densification method used by the data densifier and a sense chip comprising the data densifier are also proposed.