The invention provides a horizontal directional drilling broaching reverse circulation simulation experimental device. The horizontal directional drilling broaching reverse circulation simulation experimental device comprises a first mud tank and a horizontally arranged experimental pipeline, the two ends of the experimental pipeline are connected to the interior of the first mud tank through transparent steel wire hoses to form a first communicating channel and a second communicating channel correspondingly, and a charging funnel provided with a rock debris control valve is arranged above theexperimental pipeline; and a first mud pump, a first ball valve, a rock debris separating device and a rotary separating device are arranged on the first communicating channel, a second mud pump is arranged on the second communicating channel, a rock debris pumping device is arranged in the experimental pipeline, and the two ends of the rock debris pumping device are connected with the rotary separating device and a motor correspondingly. The horizontal directional drilling broaching reverse circulation simulation experimental device has the beneficial effects that the rock debris pumping procedure in the horizontal directional drilling reverse circulation broaching process is simulated, and by using the horizontal directional drilling broaching reverse circulation simulation experimentaldevice and method, the influences of the mud viscosity, the rock debris particle size, the rotating speed, the pumping speed and pump-out slot spatial distribution on the rock debris pumping efficiency can be researched.