The invention belongs to the field of oil field oil extraction equipment and particularly relates to a tubing anchor. The tubing anchor comprises a tubing anchor body and also comprises a pressure-limiting tripping mechanism, wherein the pressure-limiting tripping mechanism structurally comprises a sliding pipe, a conical sleeve, a one-way stop sleeve, a disc spring, an outer cylinder, a plug anda lower joint, the outer side of the sliding pipe is provided with a sliding way and a rack, the rack is provided with one-way stop teeth, the disc spring and the one-way stop sleeve are arranged in an annular space between the sliding pipe and the outer cylinder, the upper end and the lower end of the disc spring respectively abut against the outer cylinder and the one-way stop sleeve, the one-way stop sleeve is kept moving away from the conical sleeve under the effect of the disc spring, and the upper end of the one-way stop sleeve is provided with a spring claw. When thermal recovery is stopped, a tubing column is shortened, an axial pull force borne by a tubing and the tubing anchor body is limited in a certain range, so that the pull force produced after tubing column condensation does not affect the set-packing stability of the tubing anchor body and also does not cause challenge of the tensile strength of oil pipes.