The invention relates to a fence column with a locking function. A locking hood is fixedly connected to the lower end of a column body, after the locking hood is inserted into large ends of three arc-shaped hot slots in the top of a locking seat through three bayonet locks, the column body rotates, the bayonet locks slide along the arc-shaped hole slot to enter small ends to be limited and fixed,a limiting block stretches into three limiting pin holes in the top surface of the locking seat to be matched and limited through three limiting columns, and the column body cannot rotate to retreat.A safety fence is fixedly mounted through an upper hook and a lower locking hook on the column body, and a purse net lock sheet at the upper end of the upper hook rotatably stretches into a lock sheetgroove to be matched with a lock plate in the upper end of the column body to be locked and limited; and the safety fence connected and mounted through the column in a fit manner can be locked reliably for slide and loose prevention, so that the fence column is stable to support, reliable in safety protecting performance, small in size, light in weight and convenient to mount and detach.