The utility model relates to a novel plunger dismounting and righting tool of a cement truck plunger pump, which belongs to the technology of cement truck repair and solves the difficult problem of other technologies in plunger dismounting of the cement truck plunger pump. The novel plunger dismounting and righting tool of the cement truck plunger pump is formed by a handle, a rotating rod, a righting rack, a baffle plate and a six-square head through connection, wherein the rotating rod penetrates through a center through hole of the righting rack; one end of the rotating rod is provided with the handle, and the baffle plate and the six square head are sequentially sleeved on the other end; and the outer wall of the righting rack is provided with a rectangular slot and one end part is provided with external threads.