Full-flow regenerative cooling solid-liquid rocket engine

The invention provides a full-flow regenerative cooling solid-liquid rocket engine. The full-flow regenerative cooling solid-liquid rocket engine comprises a catalysis assembly, a combustion assembly and a spray pipe assembly. The catalysis assembly, the combustion assembly and the spray pipe assembly are sequentially arranged in a communicating mode. The spray pipe assembly is provided with a heat exchange flow channel, a low-temperature oxidizing agent enters the heat exchange flow channel through an inlet of the heat exchange flow channel and conducts heat exchange in the heat exchange flow channel, and the low-temperature oxidizing agent obtained after heat exchange flows out of an outlet of the heat exchange flow channel and is guided to the catalysis assembly; the catalytic assembly decomposes the oxidizing agent after heat exchange and can guide the decomposed oxidizing agent into the spraying pipe assembly so that the oxidizing agent can be combusted with the solid grain. It is guaranteed that the ove