The utility model discloses an automatic cementer of support, it contains support (1) that is located support base stone an upper surface, is provided with around this support (1) prefabricated steel mould (2), prefabricated steel mould (2) connect soon through the bolt and fix on supporting base stone a, prefabricated steel mould (2) whole flat -plate -shaped structure that be, its medial surface locates upwards to extend perpendicularly wall template (4), the one side of support (1) is provided with the slip casting device, and this slip casting device contains a gravity grout section of thick bamboo (3), the horizontal position of a gravity grout section of thick bamboo (3) is higher than support (1), the grout outlet department of a gravity grout section of thick bamboo (3) installs grout pipe (6). The utility model discloses realize the automation of grout, reduce labour demand, only need a workman just can accomplish grout work, through valve switch accurate control grout volume, reduce simultaneously because the operation on high mound of a plurality of workmans leads to the crowded safe risk that produces.