The invention discloses a weaving fabric cutting device, which comprises a base, wherein a first casing is fixedly connected onto the top of the base; a first motor is fixedly connected onto the leftside of the bottom of an inner cavity of the first casing; a first belt wheel is sleeved on the output end of the first motor; a rotating rod is movably connected with an inner cavity of the first casing. Through the arrangement and the matched use of the base, the first casing, the first motor, the first belt wheel, the rotating rod, a second belt wheel, a threaded sleeve, a first belt, a fixingplate, a cutter blade, a first slide block, a first slide rod, an opening, a through opening, a roller, a fixing rod, a top plate, a second casing, a second motor, a third belt wheel, a threaded rod,a fourth belt wheel, a second belt, a threaded pipe, a press plate, a second slide rod, a second slide block and support legs, the problem of poor shearing effect of the existing weaving fabric shearing device is solved. The weaving fabric shearing device has the advantage of good shearing effect and is worthy of being popularized.