The technological development of jointless bridges was reviewed, the advatages, application and research hotspots were introduced, the longitudinal stress characteristics, pile-soil interaction, earth pressure of backfill on the autment and seismic performance were analyzed, and the present situation and development direction of the new technology research and application were pointed out. Analysis results show that the technologies of jointless bridges have been attached to importance in many countries, and a large number of field monitoring projects and other researches have been carried out. The temperature-induced deformation is the main cause of longitudinal stress of jointless bridge, and the average temperature difference predicted by the codes is quite different from the data obtained from field monitoring. Therefore, a preciser calculation method should be developed. Pile-soil interaction is the dominant characteristic of integral bridge and is the emphasis and difficulty of the research. In calculating the soil resistance, the m method should be limited to jointless bridges with small movements, while the p-y curve method should be employed when the movements are larger. The piles of the integral abutments are stressed complexly, H-shaped steel piles may be subjected to yielding, fatigue, and buckling, while RC piles arc prone to be damaged by cracking. The high earth pressure behind the abutment induced by temperature rise is a hot spot and difficulty in the research. The mechanism, magnitude, and distribution of the earth pressure increasing with the horizontal movement and reciprocating number have not reached a consensus, and need to be further studied systematically. In analyzing the longitudinal behaviour of jointless bridge, the finite element model should involve the whole structure of the bridge, and considering the soil-structure interaction and the nonlinear performance of the joint. The stability of steel girders under compression and the crack-resistance of concrete girders under tension are the key points in research and design. The approach slab is an important and damage-prone component of jointless bridges. For the grade flat approach slabs, the frictional resistance at the bottom should be reduced, and the cracking and end settlement should be avoided. While for the buried inclined approach slabs, the swell and settlement of approach pavement above their ends should be controlled. Many new technologies for jointlcss bridges have been proposed, applied, and should be further studied, including the application of new materials and new details in various components, abutments, pile foundations, and approach slabs of jointless bridges. Jointless bridges have higher structural robustness and capability to prevent collapse and unseating of the superstructures. The research on the seismic resistance of jointless bridges has made gratified progress, but the relevant design regulations have not been formed in many countries. It is necessary to conduct comprehensive research to provide a scientific basis for engineering application and the formulation of the specifications in the future.