Grade estimation device for magnetite core

The invention relates to a grade estimation device for a magnetite core, which belongs to the technical field of geological prospecting and comprises a three-surface number display scale (2), an indicator (5) arranged on the three-surface number display scale (2), a linear elastic spring (6) arranged in the three-surface number display scale (2), a lifting handle (1), a connecting rod (4) and a fixed magnet (3), wherein the lifting handle (1) and the connecting rod (4) are respectively connected with the linear elastic spring (6), and the connecting rod (4) is connected with the fixed magnet (3). The grade estimation device for the magnetite core has the advantages of 1 being simple in structure, easy to assemble and convenient in use; and 2 improving estimation accuracy and geological record quality compared with ocular estimation.