A multifunctional magnifier comprises a lens (10), a lens holder (12) and a gripping rod (13). A protractor scale (11) is disposed between the lens (10) and the lens holder (12). The lens holder (12) is provided with multiple light-emitting diodes (121). The lens holder (12) is movably connected with the gripping rod (13). The gripping rod (13) has a recess (130). A caliper assembly (1300) is disposed in the recess (130). The caliper assembly (1300) comprises a measurement gauge (1302), a sliding member (1301), a fixing member (1304), a sliding sleeve (1303) and a screw (1305). The sliding sleeve (1303) is disposed at and movable along the measurement gauge (1302). The screw (1305) contacts and penetrates the sliding sleeve (1303) to contact the measurement gauge (1302). The sliding member (1301) and the fixing member (1304) are respectively disposed at two ends of the measurement gauge (1302). An upper portion of the gripping rod (13) is provided with a switch button (131) to control the multiple light-emitting diodes (121) to turn on and off. A lower portion of the gripping rod (13) is provided with a micro power supply (132) to supply energy to the multiple light-emitting diodes (121). The magnifier realizes functions including illumination magnification, angle measurement and size measurement, thereby facilitating convenience for a user.
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