The invention discloses a gas explosion power generation device with a hydrocone type liquid-gas mixing pipe and a composite gas explosion pool. The gas explosion power generation device comprises the liquid-gas mixing pipe, a gas explosion chamber, a water drainage pipe, a gas outlet pipe and a wind driven generator. The upper portion of the liquid-gas mixing pipe is of an open funnel-shaped structure. The gas explosion chamber is a cavity, and the outer side of the cavity communicates with the outside through three openings. The water drainage pipe is of a pipeline structure. The gas outlet pipe is connected with the corresponding opening of the gas explosion chamber, and the other end of the gas outlet pipe is led to the position in front of a fan of the wind driven generator for the power generation operation. By means of the gas explosion power generation device with the hydrocone type liquid-gas mixing pipe and the composite gas explosion pool, the defects caused when existing hydraulic power or wind power is independently used for generating power can be overcome, a hydraulic power and wind power combined technology can be provided for improving the comprehensive energy utilization rate of renewable resources with the hydraulic power and wind power as representatives, the size of a wind power generation device is reduced to a great extent, and the manufacturing cost and maintenance cost are also reduced to a great extent.