Cooling liquid nozzle assembly and engine

The utility model discloses a cooling liquid nozzle assembly and an engine. The cooling liquid nozzle assembly comprises a cooling liquid supply tail end pipeline and a cooling liquid nozzle. The cooling liquid nozzle is fixedly connected to the cooling liquid supply tail end pipeline and provided with at least two liquid spray holes, and the at least two liquid spray holes have different spray directions and are used for spraying cooling liquid from the cooling liquid supply tail end pipeline to an area, needing to be cooled, of a piston. The cooling liquid nozzle assembly is simple in structure and low in manufacturing cost, the area, with the cooling liquid sprayed, of the piston can be effectively increased, and therefore the cooling effect is improved, and the service life of the piston is prolonged. The cooling liquid nozzle assembly is applied to the engine, and the overall reliability of the engine can be effectively improved.