A clamping assembly for a glass door, said clamping assembly comprising: an outer clamping body, wherein an upper jaw for clamping said glass door is recessedly provided on the top of said outer clamping body, a first side wall and a second side wall are recessedly formed spaced apart from each other at the bottom of said outer clamping body, a first lower jaw is formed between said first side wall and said second side wall, and a first bump is provided transversely extending on an inner side of said first side wall; an inner clamping body removably disposed in said first lower jaw of said outer clamping body, wherein a third side wall and a fourth side wall are recessedly formed spaced apart from each other at the bottom of said inner clamping body, an outer side of said third side wall and an outer side of said fourth side wall abut against said inner side of said first side wall and an inner side of said second side wall, a second lower jaw is recessedly formed between said third side wall and said fourth side wall, a first recess is provided transversely extending on said outer side of said third side wall corresponding to said first bump, a second bump is provided transversely extending on an inner side of said third side wall, and said first recess corresponds to said second bump; an automatic homing mechanism detachably disposed in said second lower jaw of said inner clamping body, wherein a second recess is provided transversely extending on one side of said automatic homing mechanism corresponding to said second bump; and a positioning unit transversely penetrating said first side wall and said first bump to abut against said first recess on said third side wall. an outer clamping body, wherein an upper jaw for clamping said glass door is recessedly provided on the top of said outer clamping body, a first side wall and a second side wall are recessedly formed spaced apart from each other at the bottom of said outer clamping body, a first lower jaw is formed between said first side wall and said second side wall, and a first bump is provided transversely extending on an inner side of said first side wall; an inner clamping body removably disposed in said first lower jaw of said outer clamping body, wherein a third side wall and a fourth side wall are recessedly formed spaced apart from each other at the bottom of said inner clamping body, an outer side of said third side wall and an outer side of said fourth side wall abut against said inner side of said first side wall and an inner side of said second side wall, a second lower jaw is recessedly formed between said third side wall and said fourth side wall, a first recess is provided transversely extending on said outer side of said third side wall corresponding to said first bump, a second bump is provided transversely extending on an inner side of said third side wall, and said first recess corresponds to said second bump; an automatic homing mechanism detachably disposed in said second lower jaw of said inner clamping body, wherein a second recess is provided transversely extending on one side of said automatic homing mechanism corresponding to said second bump; and a positioning unit transversely penetrating said first side wall and said first bump to abut against said first recess on said third side wall.