The invention discloses a full-smooth straight claw type rotor. The full-smooth straight claw type rotor is composed of 11 curves including six circular arcs, equidistant curves of three cycloid curves, one line and an envelope curve of one line; from beginning of the pitch circle, the pitch circle circular arc GH, the envelope curve HI of the line, the third claw tip circular arc IJ, the equidistant curve JK of one cycloid curve, the claw bottom circular arc KA, the equidistant curve AB of another cycloid curve, the first claw tip circular arc BC, the claw top circular arc CD, the second claw tip circular arc DE, the equidistant curve EF of another cycloid curve and the line FG are sequentially connected in the anticlockwise direction; the adjacent curves are all in smooth connection, non-smooth tip points do not exist, two engaged claw type rotors are completely same, in the work process, complete correct engaging and smooth connection of lines of the claw type rotor can be achieved, the problem that claw back segment curves do not participate in engaging completely is solved, and work efficiency and work performance of claw type fluid machines are improved.