The utility model relates to a solar heat collector with a focusing element, in particular to a bridge-type composite Fresnel linear condensation and reflection unit with high capacity and a high concentration ratio. The bridge-type composite Fresnel linear condensation and reflection unit is structurally characterized in that a main reflection unit comprises a plurality of micro-arc Fresnel reflectors, the micro-arc Fresnel reflectors are positioned above heat collecting tubes and form a bridge-type distribution structure, and the bridge-type distribution structure comprises a horizontal section, a left arc section and a right arc section, the left arc section and the right arc section are symmetrical with each other around the horizontal section, the bridge-type composite Fresnel linear condensation and reflection unit further comprises an auxiliary reflection unit mounted below the heat collecting tubes, and an arc-shaped inner concave surface of the auxiliary reflection unit faces the heat collecting tubes. The bridge-type composite Fresnel linear condensation and reflection unit has the advantages that the Fresnel condensation and reflection unit is high in area utilization rate, a sunlight incident condition is sufficiently taken into consideration, loss of sunlight is greatly reduced, a heat collecting effect of each heat collecting tube is improved, an excellent focusing effect and an effect of uniformly heating the heat collecting tubes are realized, and a high-capacity condensation effect of the condensation and reflection unit is realized.