Liaohe Oilfield is an old oilfield with more than 40 years of development history. Its heavy oil production accounts for half of the crude oil production. Its heavy oil recovery technologies mainly include steam huff and puff， steam flooding， SAGD and fire flooding. With heating the temperature of crude oil to reduce its viscosity， casing will be damaged in varying degrees after several rounds of production. Casing shaping technology is one of the main technologies for casing repair. Casing deformation is prone to occur with the increase of oilfield development time. In order to ensure the production of oil fields， casing needs to be repaired by the casing reshaping process. In this paper， a new type of mechanical and hydraulic compound casing reshaping technology is developed by combining the conventional pear-shaped reshaping process with the hydraulic reshaping process. Through the optimization design of the expansion head structure， including extension of the length of the tapered guide shoe section and reduction of the taper of the guide shoe section， improvement of the steel bead strength with alloy steel used for the expansion head， which makes the steel bead strength much higher than P110 steel level， the sticking problem in the process of hydraulic reshaping construction due to the low strength of the expansion head and easy is solved. Moreover， by creatively putting forward the structure with the rigid drill collar string ahead of the expansion head， the difficulty in passing the hydraulic reshaping tool through the perforated interval has been solved successfully. The new casing reshaping technology provides fast operation of pear-like reshaping technology and strong reshaping ability of hydraulic reshaping technology. The comparison of the pear-like expanding tube expander and composite casing shaping technology shows that mechanical-hydraulic composite casing shaping technology can greatly shorten the operation time， and has good application prospect and promotional value.