Is it safe for me to lift heavy things i got kyphosis and scoliosis?

This is something you should discuss with the doc who knows your case. Not all of these are the same and both vary in intensity of the abnormalities. Any guidance must be guided by your specific degree of the problems.

Only gradual exercise under the care of a physical therapist or personal trainer with experience in such conditions. Having some input from a neurosurgeon or ortho specializing in spine may help prior and in case corrective surgery is an option.