The utility model discloses an improve support body of no tiny fragments of stone, coal, etc. Railway roadbed section of track frame coarse adjusting precision aims at providing the support body thatcan improve section of track rack mount efficiency. This support body includes the landing leg of two relative settings, and the bracing piece of connecting in the landing leg outside can be dismantled to crossbeam that both ends are connected with two landing legs respectively for horizontal tractive crossbeam and the side -to -side adjustment bolt of being connected with the landing leg, and beused for vertical tractive crossbeam and with the landing leg on the vertical adjusting bolt that is connected, two one side that the landing leg is relative all sets up the vertical guide slot that supplies beam end to stretch into, and the opposite side sets up the vertical accent knothole who supplies the side -to -side adjustment bolt to pass, two the upper end of landing leg all sets up the horizontal adjustment hole who supplies vertical adjusting bolt to pass, the upper end of crossbeam sets up the recess, the both ends department of recess sets up outer lowly by 1 in high: the 40 crossslope section. The utility model discloses section of track frame can be greatly improved and the precision is slightly spread.