The invention discloses a concrete temperature stress testing machine and a creep testing method. The concrete temperature stress testing machine comprises a free deformation testing machine and a restrained deformation testing machine; the restrained deformation testing machine comprises a bottom die plate, side die plates, two P wave sensors, two S wave sensors and a restrained deformation detection device; the bottom die plate and the side die plates are matched to form a restrained die cavity suitable for arranging a concrete restrained test piece, and two through holes are formed in the bottom die plates; the two P wave sensors are correspondingly arranged on the upper surface and the lower surface of the concrete restrained test piece, and the P wave sensor arranged on the lower surface of the concrete restrained test piece is located in one through hole; the two S wave sensors are correspondingly arranged on the upper surface and the lower surface of the concrete restrained test piece, and the S wave sensor arranged on the lower surface of the concrete restrained test piece is located in the other through hole. According to the concrete temperature stress testing machine, concrete creep can be accurately detected, and a detection result is closer to the actual condition.