Fast formwork-erecting construction device of elevator well

The utility model discloses a fast formwork-erecting construction device of an elevator well, which comprises a support bracket, wherein the support bracket consists of an obliquely-arranged bottom stretcher, a middle stand column and a top work table, wherein the size of the top work table is matched with that of the elevator well, the lower end of the bottom stretcher supports out of an elevator door, the upper end of the bottom stretcher is overlapped on the wall of the elevator well facing the elevator door, the middle stand column is divided into two sets, the upper ends of the two sets of the middle stand column are all articulated with the bottom surface of the top work table, the lower end of one set of the middle stand column is articulated with the upper stretcher body of the bottom stretcher, the lower end of the other set of the middle stand column is clamped on the lower stretcher body of the bottom stretcher, and the top work table is provided with an inner wall formwork and an outer wall formwo