The invention relates to an X-shaped link telescopic boom type hydraulic power engine and generator set device, and relates to a more efficient technical scheme and a more efficient device based on the technical scheme of 'Hydraulic power engine and generator set device' with the application number of 200810091304.8 of the previous patent application. In the device, a turning type connecting rod 25 can be lengthened by over 5 to 10 times, and the hydraulic power efficiency can be improved by over 30 times on the original basis, so that starting power can reach 5,000 watts from hundreds of watts and can be amplified to over megawatts per hour by four to five steps in combination with primary and secondary type link amplifying power. The device mainly comprises an A set power-assisted X-shaped link telescopic boom and a B set power-assisted X-shaped link telescopic boom which can achieve good effects of making up deficiencies of each other and being mutually compatible and compensated. Under the interaction of an anti-lateral deviation device, the device steadily and efficiently drives the turning type connecting rod to do gyratory motion so as to input power, the using cost does not reach 0.2 percent of that of coal-fired thermal power generation, and the energy is a man-made, mechanical, manual controllable, environmentally-friendly and renewable novel energy source. The device is not limited by territorial environments, is safe and reliable, can be widely used for electric power, trains, 10,000-ton class steamships, automobiles, engineering machines, motorcycles, agricultural machines and the like, and can contribute to reducing production cost, saving energy, reducing emission and benefiting mankind.