The utility model discloses a triangular valve with an integral valve core, which is used for controlling the on-off of a water flow. The triangular valve with the integral valve core comprises a valve cover and a valve body which is provided with a water inlet end and a water outlet end, wherein a valve core is arranged in the valve body in a rotatable way; the valve core is provided with a water inlet and a water outlet which respectively correspond to the water inlet end and the water outlet end; the water inlet is communicated with the water outlet; the valve core comprises a connecting part which is fixed with the valve cover through a connecting piece; and the connecting piece penetrates through the valve cover. In addition, the valve body encloses to form an inner cavity; the inner cavity has through holes in three directions, and comprises a water inlet end, a water outlet end, an installation end and a transition part formed between the water outlet end and the installation end; and a stop part which is protruded annularly inward is formed in the cavity of the water inlet end. The triangular valve is convenient to use, low in production cost, easy to install and long in service life.