Diesel engine combustion chamber, piston and diesel engine

The invention relates to a diesel engine combustion chamber, a piston and a diesel engine, the diesel engine combustion chamber comprises: a base having a top surface; the first combustion cavity is concavely arranged on the top surface along a first direction; the second combustion cavity is concavely formed in the top surface in the first direction and is arranged around the circumferential direction of the first combustion cavity; the rewinding ridges are arranged on the bottom wall of the first combustion cavity in a protruding mode and continuously arranged around the central axis, parallel to the first direction, of the base. According to the diesel engine combustion chamber, space and air in the air cylinder can be fully utilized, the combustion efficiency of fuel oil is improved, emission of soot particles is reduced, more space and working media in the air cylinder are heated through the fuel oil under the same heat release amount, the temperature in the air cylinder is lowered, generation of high-te