A turbine blade includes a blade body, a division plate, a plurality of first protruding ridges, a plurality of second protruding ridges, a first jet hole group, and a second jet hole group. The blade body includes a suction-side wall surface and a pressure-side wall surface, which are provided with multiple film cooling holes. The stagnation region at the leading edge of the blade body is provided with multiple film cooling holes. The first and second jet hole groups are provided on the division plate. The first protruding ridges are provided on a suction-side inner wall surface, and the second ridges are provided on a pressure-side inner wall surface. An engine including the turbine blade is further provided.