Concrete construction formwork with improved structure

The utility model relates to the technical field of concrete, in particular to a structure-improved formwork for concrete construction, which comprises a first frame plate and a second frame plate, two ends of the first frame plate and two ends of the second frame plate are fixedly connected through mounting mechanisms, a first crank is movably mounted on the outer side of the middle of the first frame plate through a shaft sleeve, and a second crank is movably mounted on the outer side of the middle of the second frame plate through a shaft sleeve. A second crank is movably mounted on the outer side of the middle of the second frame plate through a shaft sleeve. By arranging the first frame plate 1 and the second frame plate 2, the device can be assembled in three modes, the first mode is to assemble when the concrete shaping length is not changed and the width is reduced, and the second mode is to assemble when the concrete shaping width is not changed and the length is reduced. According to the third mode,