A pipe pressing device comprising: a body with a front end, a rear end, and an upper portion and a lower portion between the front and rear ends (201, 202), the upper portion of the body being provided with a clamp assembly for holding and pressing a pipe and a locking fastener, and a rack, the clamp assembly including a stationary member disposed at the front end of the body and a movable member fixed to the rack, at the lower portion of the body being provided a movable handle, a rack control member and a stationary handle, the movable handle and the rack control member being engaged with the rack to make the movable member move or fixed between the stationary member and the rear end of the body; wherein the movable handle is elastically pivoted to the front end of the body and capable of being pushed back to its original position, the stationary handle is fixed to the rear end of the body, the rack control member is located adjacent to the stationary handle and disposed between the movable and stationary handles (50, 70) and capable of being pushed back to its original position; the upper portion of the body is provided with an insertion hole running through the front and rear ends (201, 202) of the body, and an assembling portion located at the front end, characterized in that the pipe pressing device further comprises a slit which extends from the middle of the body to the rear end and is in communication with the insertion hole, the lower portion of the body is provided with a pivot groove located at the front rend, an assembling groove located at the rear end, and a middle groove which is located adjacent to and in communication with the assembling groove, the pivot groove and the middle groove are in communication with the insertion hole; the rack is inserted in the insertion hole and provided with a ratchet surface which is located toward the lower portion of the body and exposed to the pivot and middle grooves (24, 26); the movable handle includes a handle portion, a cavity formed at one end of the handle portion, and a compression spring and a pull member which are disposed in the cavity, the pull member includes a slot formed in the middle portion thereof and has one end pressed against the compression spring, another end of the pull member is formed with an engaging tooth for meshing with the ratchet surface of the rack, the handle portion and the pull member are pivoted to the pivot groove of the body by a pivot inserted through the cavity and the slot, at one side of the one end of the handle portion toward the front end of the body is formed a first pivot point, in the pivot groove is formed a second pivot point, and a stretch spring has two ends pivoted to the first and second pivot points (P1, P2) to provide an elastic force for pushing the handle portion back to its original position; the rack control member includes a rod body and a push member, one end of the rod body is pivotally fixed in the middle groove by a pivot inserted into the body, a connecting portion is formed at the one end of the rod body and located toward the front end of the body, and a connecting pivot extends from the connecting portion and is inserted in one end of the push member, another end of the push member is formed with a control tooth form meshing with the ratchet surface of the rack; the stationary handle has one end fixed in the assembling groove of the body, at a middle portion of the stationary handle and the rod body of the rack control member is formed a compression spring hole (613, 71) for accommodation of a compression spring which provides an elastic force for pushing the rod body back to its original position; pushing the movable handle back and forth repeatedly makes the pull member move within the insertion hole in unidirectional manner, pressing the rack control member makes the rack move towards or away from the stationary handle, so that the rack is caused to engaged with or disengage from the push member.