A tool designed for restoration / repair of formwork props comprising a housing, and control and restoration parts, and a rotational part section, which is rotated around its axis clockwise or counterclockwise, characterized in that it further comprises: • a dilative operational part section to be inlet into the damaged formwork prop close to the place, which is to be repaired; • where the dilative operational part section is comprised of: ∘ one or few connected pipe-shaped elements (5, 6) designed for letting the dilative operational part section into the to be restored formwork prop and, depending on the need, extending the overall length of the tool; ∘ stationary part, functioning as the tool housing; ∘ bolt, integrated into one ending of the stationary part and designed so that the stationary part does not to rotate with the rotational part when a key is inserted on the integrated bolt to hold the mentioned integrated bolt; and ∘ dilative head, designed for restoring the geometry of the formwork prop to the initial position; where head of the tool is comprised of: ▪ pulled / pushed wedge, connected with the screw mechanism of the rotational part; ▪ spread / indrawn plates, which, depending on the rotational direction of the tool driver for the screw, are pushed or pulled by the mentioned wedge; and ▪ elastics put on the mentioned spread / indrawn plates and performing the function of returning to the initial position of the mentioned plates, when the head plates are loose; • where the rotational part section is comprised of: ∘ driver for the screw, designed for rotation clockwise or counterclockwise, and ∘ rotational part based on the screw mechanism, connected with the driver for the screw of the tool, and, when using the screw mechanism, with the wedge pulled / pushed by the head of the tool. • a dilative operational part section to be inlet into the damaged formwork prop close to the place, which is to be repaired; • where the dilative operational part section is comprised of: ∘ one or few connected pipe-shaped elements (5, 6) designed for letting the dilative operational part section into the to be restored formwork prop and, depending on the need, extending the overall length of the tool; ∘ stationary part, functioning as the tool housing; ∘ bolt, integrated into one ending of the stationary part and designed so that the stationary part does not to rotate with the rotational part when a key is inserted on the integrated bolt to hold the mentioned integrated bolt; and ∘ dilative head, designed for restoring the geometry of the formwork prop to the initial position; where head of the tool is comprised of: ▪ pulled / pushed wedge, connected with the screw mechanism of the rotational part; ▪ spread / indrawn plates, which, depending on the rotational direction of the tool driver for the screw, are pushed or pulled by the mentioned wedge; and ▪ elastics put on the mentioned spread / indrawn plates and performing the function of returning to the initial position of the mentioned plates, when the head plates are loose; ∘ one or few connected pipe-shaped elements (5, 6) designed for letting the dilative operational part section into the to be restored formwork prop and, depending on the need, extending the overall length of the tool; ∘ stationary part, functioning as the tool housing; ∘ bolt, integrated into one ending of the stationary part and designed so that the stationary part does not to rotate with the rotational part when a key is inserted on the integrated bolt to hold the mentioned integrated bolt; and ∘ dilative head, designed for restoring the geometry of the formwork prop to the initial position; where head of the tool is comprised of: ▪ pulled / pushed wedge, connected with the screw mechanism of the rotational part; ▪ spread / indrawn plates, which, depending on the rotational direction of the tool driver for the screw, are pushed or pulled by the mentioned wedge; and ▪ elastics put on the mentioned spread / indrawn plates and performing the function of returning to the initial position of the mentioned plates, when the head plates are loose; ▪ pulled / pushed wedge, connected with the screw mechanism of the rotational part; ▪ spread / indrawn plates, which, depending on the rotational direction of the tool driver for the screw, are pushed or pulled by the mentioned wedge; and ▪ elastics put on the mentioned spread / indrawn plates and performing the function of returning to the initial position of the mentioned plates, when the head plates are loose; • where the rotational part section is comprised of: ∘ driver for the screw, designed for rotation clockwise or counterclockwise, and ∘ rotational part based on the screw mechanism, connected with the driver for the screw of the tool, and, when using the screw mechanism, with the wedge pulled / pushed by the head of the tool. ∘ driver for the screw, designed for rotation clockwise or counterclockwise, and ∘ rotational part based on the screw mechanism, connected with the driver for the screw of the tool, and, when using the screw mechanism, with the wedge pulled / pushed by the head of the tool.