Building formwork and building mold

The invention provides a building formwork and a building mold, and relates to the technical field of buildings. The building formwork comprises a sliding plate assembly and a formwork assembly; the formwork assembly comprises two formworks which are oppositely arranged in a spaced mode, wherein the sliding plate assembly is detachably connected between the two formworks; the sliding plate assembly comprises at least one sliding plate and a limiting piece fixedly arranged in the middle of the sliding plate, wherein the two formworks are located on the two sides of the limiting piece correspondingly and slidably connected with the sliding plate; and the two formworks can move close to and away from the limiting piece correspondingly so as to adjust the distance between the two formworks. The building formwork can solve the technical problems of complex procedures and high cost in the prior art due to the fact that a utilized formwork needs to be cut so as to meet pouring size requirements or the formwork with