The invention discloses a mechanical shovel, mainly comprising a box (1), a driving wheel (2), a crank shaft (3), a connecting rod (4), a slide rod (5) and tines (9-10); the box is separated by a separation plate into two independent cavities, namely a crank shaft cavity and a tine cavity; the crank shaft and the connecting rod are arranged in the crank shaft cavity, the connecting rod is connected with a curved cam of the crank shaft, and one end of the crank shaft is connected with the driving wheel; the rear end of the slide rod is connected with the connecting rod in the crank shaft cavity, and the front end of the slide rod passes through the separation plate to be connected with the tines in the tine cavity. According to the mechanical shovel, by connecting mechanical power, the aims of effectively uprooting weeds and loosening soil, greatly improving agricultural field management efficiency and reducing labor intensity are achieved; the mechanical shovel has the characteristics of being light in weight, laborsaving and convenient in operation, free of farmland ground condition limitation, thorough in weeding, and ideal in soil loosening moisture conservation effect, and is widely applied to weed uprooting and soil loosening moisture conservation in orchards, tea gardens, gardens, nurseries, flat ground, hilly land and mountain land.