Rotary supporting and fixing bracket for crane

The utility model discloses a rotary support fixing support for a crane, which relates to the technical field of crane supports and comprises a crane and a support plate fixedly arranged at the bottom of the crane, a hollow block is fixedly arranged at the bottom of the support plate, sleeves are slidably arranged on four sides of the hollow block in a penetrating manner, and support pipes are slidably arranged in the sleeves in a penetrating manner. A fixed disc frame is fixedly arranged at the bottom of the supporting pipe, a transverse adjusting mechanism is arranged between the supporting pipe and the sleeve, four grooves which are symmetrically formed in the four corners are formed in the bottom of the hollow block, and separating and meshing mechanisms are arranged in the grooves. According to the hollow block, the sleeve, the supporting pipe, the fixed disc frame and the transverse adjusting mechanism provided by the utility model, the fixed disc frame extends out and is in contact with the ground thro