The invention relates to a poured pile sediment detector, which comprises a lifting rope, a hanger, a counterweight rod, a protection plate, a probe, a guide plate, a spring leaf and a one-way slab; the counterweight rod is a cylindrical weight with the hanger disposed on the upper part; the lifting rope is tied on the hanger; the protection plate is disposed on the lower end of the counterweightrod;. the probe is disposed under the protection plate; the bottom end of probe is a inverted cone; the bottom diameter of the cone is larger than the diameter of the probe; the one-way slab is disposed upon the cone structure; the guide plate is fixed on the one-way slab; the spring leaf is fixed on the connection point of the one-way slab and the guide plate; the one-way slab, the spring leaf and the guide plate each has a circular hole formed thereon, the probe is disposed with the one-way slab, the spring leaf and the guide plate on outside; and a certain included angle is kept between the spring leaf and the one-way slab. the body achieves the advantages of simple structure, easy dismounting and maintaining, convenient using and good practicability.