Mold for quickly checking size of beam

The invention discloses a mold for quickly checking the size of a beam. The mold comprises a main mold, a plurality of first auxiliary molds and a plurality of second auxiliary molds which are matchedwith the main mold, wherein a plurality of first connecting ports are uniformly formed in the two sides of the main mold; connecting buckles matched with the first connecting ports are arranged on the first auxiliary molds and the second auxiliary molds; meanwhile, second connecting ports matched with the connecting buckles are further formed in the other side of each first auxiliary mold and theother side of each second auxiliary mold, and a first scale area and a second scale area which are matched with each other are further arranged on the sides, provided with the first connecting portsand the second connecting ports, of the main mold, the first auxiliary molds and the second auxiliary molds respectively. Furthermore, a handheld ring is arranged on the main mold. The mold has the beneficial effects that the s