The invention relates to a mechanical exercycle which comprises a main girder, a front fork, a rear fork, a front exercycle wheel and a rear exercycle wheel, wherein the front fork, the rear fork, the front exercycle wheel and the rear exercycle wheel are arranged on the front end and the rear end of the main girder, and a stopcock is also arranged on the front fork. The mechanical exercycle is characterized in that the front fork and the rear fork are articulated with the front end and the rear end of the main girder; extension rods are inwards arranged on the front fork and the rear fork; the outer ends of the two extension rods are respectively connected with connection rods, and the other ends of the two connection rods are respectively articulated with two ends of a suspended girder; a guide holder is arranged on the middle part of the main girder, a slide rod or a slide sleeve is arranged on the guide holder in a matching mode, a seat plate is arranged on the upper end of the slide rod or the slide sleeve, and the middle part or the lower end of the slide rod or the slide sleeve is fixedly connected with the suspended girder; a left lever and a right lever are also arranged on both sides of the middle part of the main girder, one ends of the two levers are respectively connected with a left foot stick, a right foot stick and a foot board, the other ends of the two levers are connected with shafts, and a needle roller bearing arranged on the shaft forms a scroll connection with the lower surface of the suspended girder; and an unidirectional rolling bearing arranged on the centre of the front exercycle wheel and the rear exercycle wheel is connected with the front fork and the rear fork. The invention has compact structure and strong interest, integrates entertainment and fitness into a whole, and is especially suitable for adults or children to ride.