Multifunctional sit-up bench with wide application range

The utility model discloses a multifunctional sit-up bench with a wide application range. The multifunctional sit-up bench comprises a main frame body, wherein a lying plate is fixedly arranged on the main frame body, an upper foot hooking frame is arranged in a position, positioned in front of the lying plate, of the front part of the main frame body, the lower side of the front part of the main frame body is hinged and connected to a front foot frame, the lower part of the upper foot hooking frame is hinged and connected with a lower foot hooking frame, a tension spring is connected between the middle part or the lower part of the lower foot hooking frame and the front foot frame, the upper foot hooking frame comprises a backwards extending inserting rod, at least two regulating holes are formed in the side wall of the insertion rod, the main frame body is provided with an insertion pipe in forward and backward trends, through screw holes are formed in the insertion pipe, positioning pins are connected in the screw holes through screw threads, each positioning pin comprises a screw rod part and an insertion pin part positioned at the front side of the screw rod part, the outer diameter of the screw rod part is greater than the diameter of the regulating holes, the diameter of the insertion pin part is not greater than the diameter of the regulating holes, and the insertion rod is inserted in the insertion pipe. The multifunctional sit-up bench has the advantages that the multifunctional sit-up bench can be applicable to exercisers with various leg lengths, and in addition, the exercising intensity is adjustable.